Oh, so not only do you find a scene and automatically assume that you're entitled to participate, but when you get into one, you make a banal, non-interactive pose and then wait for other people to do the work to include you. And there's nothing to take personally in that? You are remarkably tone-deaf.
Yes, I am entitled and insensitive for stating my public RP preferences.
Like this. Obviously, I'm not saying you're entitled for stating your preferences. I'm saying that your preferences indicate an intense sense of entitlement. I'm saying that what you do when you walk into a room where people are RPing is just think about yourself and then get upset when people don't bend over backwards to accommodate you.
Here's an experiment: try asking first. I think you'll find more people willing to accommodate you if you give them some warning. Say, "Hey, I'd like to join your scene, but I'm really bad at giving reasons for people to include me, so would you mind making an excuse to allow me to RP with you?"