- Your real world identity - meaning anything past your first name, including your general geographical location (city, State, etc). Please remember if you e-mail or share documents using your e-mail accounts those often include that name!
INCREDIBLY. And I was not always very good at this. It is very, very easy to forget that the people you might talk to every day on the internet are strangers. That what you post on the internet is forever and that shit can come back to haunt you. I was on a forum for a decade or more that was targeted by gamergators. They basically came after mainly women posters who had "ideas" about video games/gaming. This lead to people's families being threatened, people seriously doxxing them to find their home address and telephone number, and a few people had some of their posts where they talked about work sent to their workplaces.
Since that's happened I try very hard not to give out very identifiable information online just in general. @Ghost raised some excellent, excellent points that your average person just does not think about when it comes to how much of your information is getting out there. If you are not watching yourself, you should. I've been around since usenet/IRC days when people would joke about axe murderers, but I still went to plenty of meetups, traded pictures with people, gave my phone number out, and way, way over shared. And we were all super assholes back then, but no one I knew (or knew of) would go to the extent of trying to hunt down someone's real life home address to send them threats or trying to get them fired because they had an opinion they disagreed with.
- This is a subset of the above but I wanted to isolate it... what about your gender, family status, religion, etc? That is, stuff about your social status.
It fucking sucks to be a woman on the internet. When I am going somewhere new, I pick a handle that would be hard to pin a gender on. Most people will automatically assume you're a guy if you're talking about video games or gaming. You don't get the rape threats until they figure out you're a woman.
There are a select few MUSHers that I am Facebook friends with, some of which I've "known" since I was 15. They're good people. I'd say the vast majority of MUSHers are nice people. But one crazy fucker that has you talking to your boss about potential RL blowback because you thought there were issues with representation in something can really sober you up quickly to the realities of how dangerous sharing online can be. And it can be really, really hard not to share. I'm a very social person. I want to talk about how cute my kids are. I want everyone to know how great they are!
But see how easy that is? Okay, now you know I'm a parent. I've got more than one kid. So, if you wanted to start stalking me and trying to figure out who I was, that's a nice clue to have.
- Your 'physical' digintal footprint; for example sharing pictures of yourself, but also even being on a voicechat with others; do you only do it with trusted few or go on general channels?
I don't do it anymore, but I DID do it a lot back when I was a teenager/early 20s. Now my shit is locked down and I do not share stuff like that with strangers i.e. anyone not on my very short Facebook friends list.
- Your e-mail address or other online traces of your identity outside of gaming.
I have so many damn email accounts, all for different aspects of my life.
- Your identity on games - are you at all concerned about people figuring out your alts, or who you play on other games, including non-MU*? What about the room you are in, or who you are RPing with?
I took a seven year break from MUSHing so I'd be pretty impressed if anyone could figure out who I was. I often got lumped into whatever nonsense @TheOnceler was up to, regardless of whether or not I was aware/contributing to it, so that's the only thing I even slightly worry about. It is very frustrating to always be treated like an extension of your partner/spouse/roommate/whatever, but it happens just about everywhere on the internet when a pair of people are posting/playing. And MUSHers have looooong memories. So I don't advertise that I'm me where I'm playing or talk about past games until I've established myself. And then the conversation always goes like this:
Me: I'm so and so and played here.
Them: Ooooh I remember you! I hated you then!
Me: Yeah, we all took things very seriously back then didn't we.
Them: Haha, yeah, god we were stupid kids. Want to RP?
Fin.
Otherwise, I don't care if people know who my alts are, where I am, or who I'm RPing with. If I'm on a game, I'll RP with anyone and everyone from the guy people think is problematic to the most popular kid in the room.
tldr: If you are not being careful online YOU SHOULD BE CAREFUL! If you are being careful, BE MORE CAREFUL! It is god damn terrifying to have someone you don't know and don't even remember having a conversation with sending you a personal email that's not associated with a forum and start saying how they could really fuck things up for you if X learned about this post you made ten years ago.