Yes and I find them very comfortable, don't do it for safety reasons, I just find my feet and legs feel a lot better after a long flight when I wear them.
On short haul I don't but on longer flights I always put on the ones you get in the bag of 'complimentary stuff' I usually get my shoes off shortly after boarding and wear the socks over my normal socks as my feet get cold otherwise.
No idea if these ones help with DVT or not though.