I did have this experience once though, where I was asked by a parent about the suitability of a game. Was passing through New York and wanted to pick up a game, ended up in some EB or whatever.
Kid wanted to get MK: Deadly Alliance for the Gamecube. Mom was totally unsure about it, she'd heard about MK on the news in the past. Kid was all like 'This one's in 3D, it's different, it's not bad, honestly.' The mom turned around and asked me, and I gave my honest opinion that the game was super violent and not for kids. Kid got really upset, not like angry, just really upset, because he thought now he wouldn't get any game. So I made a suggestion, and the kid went home with
He didn't look thrilled about it, but I hope in time it worked out.