@Setanta,
Well I suppose it depends on what they've been colored with.
Spray paint fumes can make your head fuzzy so people colored with spray paint maybe shouldn't be allowed to vote because they're intoxicated.
If they're colored with those type of magic markers that smell really bad they probably should be allowed to vote only after everyone else has cleared out.
I'm not really sure where I stand on the Blue Man Group.
I've they've been colored with crayolas or watercolors or something nice like they then sure, they should be allowed to vote just like the rest of us.