Personally can advocate the use of both...
Specs are great to wear when you've been at work all day wearing your lenses and your eyes feel like they got half a ton of grit in them.. misting has never been a problem for me (and a lot less hassle than visor misting).. opening the visor (or leaving it open) by a few mm sorts the worst case out in microseconds..
As for accidents while wearing them, I've rolled a car and had to crawl around the back seat to find them and I wrote off my Kwak ZX-6R at 60mph ending up with me bouncing off some armco barrier.. nothing broken ('cept the bike

), bones and specs fine and no facial cuts either.
Wearing lenses while riding is fine too as they substantially lessen the effects of hayfever eye itching for me.. yeh they are a minor fiddle to put in, basic hygiene needed blah blah but that takes all of 20 seconds.. Perhaps less practical on extended wilderness trips I agree..
Suppose everyone can quote exceptions but do they really prove a rule in this case not to wear specs on a bike? Surely if they do cause you damage then you've either got a sh*t helmet/visor or there's so much damage to your lid that your brain is mushed anyway?

Only thing I ever noticed was the difference in depth perception when you swap between the two.. but so long as you're aware of it it's no problem.
Wear what you're comfortable with so you can 1) see, and 2) concentrate on the fun to be had through the curvy bits.. or the gooey bits..
