Yeah, I could see that happening about once in every twenty million cars that pass you by. The noodle bends if something hits it, so you'd have to be ridiculously unlucky for something to actually catch onto it. OTOH, it would make you more visible to at least 9 out 10 cars that pass you by, so I think that's a decent tradeoff.

The one real disadvantage I see is annoying my fellow cyclists. If you're sharing crowded urban bike lanes, you'd become an awkward obstruction, possibly causing them to swerve out into traffic if they needed to get around you.