What's funny about this is that since he always asks permission to do the parody before doing so (even though he has every right not to), so if the artist, (hopefully) knowing full well who Al is, okays the parody, they must not take themselves all that seriously... that or they don't mind the extra royalty cash, either or.
Funny enough, one of the most notable artists to consistently turn down Al's parodies is the man in Edwin's avatar.