No, they're not. I am not exactly sure of the policy with comps though. I did have an UGLY incident about 5-6 years ago at DLR. I had four comps left for me, but two of the friends they were for couldn't go at last minute. I thought I'd make a little MAGIC of my own and hand them off to two strangers (see, the Spirit has a big heart ... too!) Well, I went up to a family of five who were in line for tickets and told them I had free tix and didn't need two of them and that I didn't want anything for them. The CM in the booth must have had cat-like eyes because she started screaming at me from inside the booth and totally freaked the family out who nervously declined.
I wasn't happy. ... I just moved out a bit from the booths and found a young couple and they graciously took the tickets and thanked me profusely. Since the tix were comped and in my name, I don't see how/why Disney could have any say on who actually used them beyond one for me.
(oh, and they were all dated -- only could be used that day!)