Imperfectionist said
Not in the game, just lurking, but my thought here, Raineh Daze, is that you can't berate your fellow players and tell them they're doing it wrong... Before they've done it wrong. You don't want a ridiculous Mary-Sue backstory to come up (e.g. "By the gods, I just remembered that I'm actually from Krypton, so now I have superpowers, even though that doesn't fit the setting at all!"), and that's a fine thing, because it can (of course) disrupt the narrative of an RP, if something like that happened, the GM would say "wow, that's dumb" and would tell the player to think of something else, if not kill off the character right there. What it seems like you're saying is that when these amnesiac characters DO reveal their backgrounds, they are guaranteed to be stupid, that Konica won't do anything it, when she/he might have done something if the stupid backstory was submitted as part of a sheet...Frankly, if I were Konica, I'd be a little insulted. It's as if you don't think she/he can govern her own game.
If the GM is omniscient, which they're not; perfectly attentive to everything, which they're not (it's impossible not to miss something); and willing to bring everything to a halt because one character is stupid, which is an unknown. It also doesn't fix the potential for a character with an unknown background to eventually supplant the plot with a focus on whatever made them amnesiac in the first place.
Apparently just wanting to be put in the bio is insane, even though that fixes the problem and gives other people more to work with OOC, and doesn't change anything (nobody knows anybody else's backstory IC anyway).