if it's ic for your character, sure, you could do that! except there usually isn't much dirt to gather on most characters, and i can't think of any character who'd do that. even someone like batman wouldn't just fling all of his info at someone like that, even if it'd be ic for him to go through the journals for info.

seriously, you're worrying too much. nobody's ever done that and i doubt anyone will because most characters can't do that without being ooc. and this is the sort of thing you'd get called out for for sure if it's not appropriate for your character.