Prince said
Criticism, be it constructive or not, can still be rude. Additionally, there is a point when an opinion or even the opinion of several are still based on preference. Recently, I have been scrutinized for my flowery writing style. So what? I'm still grammatically correct and there is a huge crowd that would rather read well-constructed, flowery sentences than dull, neutral descriptions or statements. That is preference, collective or not, and it is rude to push your preferences onto others. Before making any criticism, you should be aware if you are criticizing an actual, detrimental issue or just a personal one that doesn't need addressed whatsoever. Also, the purpose of asking permission is for etiquette. Not only is criticism on any level an often sensitive issue, using a polite, well-mannered attitude is the best way for toning down the negative issues with it and reaching the desire goal.Oh, and to anyone who attempts to be judgmental or criticize you in their very first message toward you can fuck off. That's rude as fuck. Saying "you show potential if..." or "if you improved this" really just merits you a whole bunch of social animosity that you generally deserve.That's another excellent point. Some people just plain don't give a fuck, and kudos to them! There is no point in criticizing someone whom doesn't want nor appreciate the gesture. That, as a matter of fact, is when it becomes rude.
These threads seem to inflate rather quickly.
Role-play merits as much criticism as literature written for other people to read deserves. Additionally, due to the multi-player nature of role-play, someone criticising your role-playing skills isn't like someone walking in on you during a single-player game and criticising your skills, it's like someone criticising you in a multi-player game for making the game less enjoyable for everyone else involved.
TL;DR, people actually have to read that shit, and if they aren't allowed to criticize it for no other reason than they cannot get permission, why.