Well, carbon is mega strong and much stronger than metals in ONE DIRECTION ONLY
Hence my note that if you can expect knocks on storage it's not the best material to use, as if it fails it fails totally and you may end up on your face. Hence touring frames are not made from carbon.
The rest is up for discussion and I never owned a carbon bike, so I can't comment. If you have a safe storage for it, knocks shouldn't be an issue.
I'll feed the troll.
http://www.youtube.com/watch?v=Y_O9PLorYPA
yawn