I've done alot of those as of late when going to vote(non-votes, such as voting for Mickey Mouse, Donald Duck).
The one older guy working at the polling place I've worked at for the last 3-4 years for every primary and general election just kinda shakes his head and makes a comment with every vote for some shmoe who isn't officially on the ballot or one of the nonsense ones.
Personally though, it's me(and many others apparently)voicing my distaste for this shitty system by voting for 'none of the above'.