Guilty, at least when I fish alone. To me, it's just being lazy and that's exactly what I am.

My fishing partner does this BUT even worse: he lets them dangle INTO the water.... in a river.

None have gone overboard yet, but as the river current and boat movement do their thing, they can interfere with my cast & retrieve.  Sometimes I flip them back over the gunnels with my rod tip.  

He's a great person, don't get me wrong, but slack-a-daisical in this regard.