I'm not saying that it would dissuade impulse apps entirely, but it would force those people to consider actual fit into the setting rather than oh hey, my friend is apping in and I want to play with them or oh hey new shiny canon and my character isn't taken there.
I also think it's especially a good thing for those characters who don't obviously fit into a setting and villain characters. But the major thing is for it to show that the player did indeed read the FAQ and has some clue of where to go with the character. Seriously, how often do we get players not reading the FAQ and then getting upset over what the game's setting is? At least something like this benefits the player unlike those secret word in the FAQ questions that used to exist to show the player read it.
Re: Advice from the bridge
I also think it's especially a good thing for those characters who don't obviously fit into a setting and villain characters. But the major thing is for it to show that the player did indeed read the FAQ and has some clue of where to go with the character. Seriously, how often do we get players not reading the FAQ and then getting upset over what the game's setting is? At least something like this benefits the player unlike those secret word in the FAQ questions that used to exist to show the player read it.