When I first got my V2s, the knee "blocks" (because the way they were attached were very sloppy, not like current blocks at all) would wave in the breeze. Especially when I first started it was a real struggle not to have them catch on each other without having a real bow-legged stance especially when skating backwards, so yeah I could see it being a possibility.
Having said that, today's blocks are every rigidly attached t the side of the pad, so I don't know if that could be an issue