I begin this post with the caveat that I do understand unsolicited advice is generally considered to be a no-no. Hence I am asking for general advice on ... advice.
This is in regards to a particular situation I am observing on a MU*-That-Shall-Remain-Nameless involving someone's portrayal of a character that is already an existing intellectual property. I am not going to name the character in question, because I have no desire for a name-and-shame scenario (I'd go to the Hog Pit for that).
This person has a character that is, as presented in media, a sociopathic (or at least highly violent and murderous) manipulator who has the ability to manipulate the emotions of others in any direction using pheromones. The character's history includes a lot of luring, trapping, murdering, torture, etc. - generally villainous behavior. The character has also shown some bisexual tendencies in the use of their pheromones and has had both same and opposite sex lovers mentioned in the source material.
This person is, however, portraying this character, in both in and out of character areas, as essentially a walking glitter-dusted erection with Louis Vuitton handbags who sissy-slaps with rich girls over FABULOUS FASHION (fingersnap) and sniffs the buttcheeks of every other male character that walks by, determining their worth as a person according to their looks.
This behavior has been off-putting to the point where I am seeing and hearing other people beginning to leave areas they are in or not scene with them, or say they refuse to scene with them. I think this person has a lot of potential as a roleplayer if they'd just rope it in a little. I don't think they are aware of how their behavior is affecting their RP opportunities.
Hence my dilemma: Is it worth it to take them quietly aside and as gently and tactfully as possible ask them to tone it down a little so they can have more roleplay options, or is it better that I let the trainwreck continue on full speed into the wall they're headed towards?
(I ask because in my younger RP years, I had someone kind enough to take me aside and rip me a new sphincter over some stupid things I'd done, and I took that to heart, learned from it, and had better and more RP because of it. In this case I'd refrain from sphincter ripping.)