I'm sure they use artist's as well. Someone had to design the hahatimes and some of the other designs on various sites. And yeah me too, when I was at the Dentmobile I loved being in character.
A group of girl's kept asking the 42 guys, "Does this have to do with the next Batman movie? Gotham City, that's batman right?" And the guy responded,
"A Batman movie? Gee they'll make movies about anything these days." With a big smile. The girls didn't get it and kept asking about Batman. Eventually I looked at them and said,
"They haven't even proved that The Batman really exists. I heard that some lazy cops made him up to scare criminals. He's an urban legend, like penguins in the sewer." The other fans and 42 people laughed but the girls looked at me like I was an idiot. Little did they know...