Does Riot still care about role stealing in blind pick?

Had an Udyr last game lock in jungle after I'd called it, but because me and our Malphite managed to carry the game and win he thought he'd get out without a report. What with new draft pick being around for so long now, does my report mean anything? Hard to prove he stole a role if he wasn't assigned one to begin with and I'm not sure if pre-game chats are accessible. It just kinda sucks thinking that he can do this whenever he wants and get away with it.
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