[quote=@vancexentan]
I'm tired of having players in my own roleplays repeatedly try to enter new ones that I make and have little choice but to accept them or have the whole bloody interest check look bad because I have to actively be hostile to the one poor roleplayer that has shown up. 
[/quote]

Wanna know a really cool way to prevent people you can't stand from joining your roleplays right now, without a cumbersome reputation system?

you add this as a rule on character sheets:

[quote=@BrokenPromise]

~ A character sheet can be rejected for any reason, including your behavior and grammar in other RPs.

[/quote]

Emphasis on "any reason." And before you ask, no, this did not stop the 10+ people from initially joining the RP. In fact, I just got a request to join last week.