It's just not funny. At all.
When I watch this episode, it just reinforces the feeling that underneath it all this show is more about trying to shock people into wasting ten to twenty minutes commenting on racism and society's problems and nothing else. There's no underlying message. It's just to make some people go, "Argh!" I mean, c'mon. It's obvious they're baiting the "victims" to get them to react a certain way. If they didn't, there would be even less of a reason to watch. The point of the show appears to be humiliate people. But instead of scaring them with fake rats and spiders and blowing air to lift women's dresses, they are using race. Not Nascar or NHRA races, either. I like NHRA better, myself.
Anyway, it would have been funnier if an actor stole something and ran off. Then the guy would have to explain himself and the "owner" would make the glasses man feel sheisty.
If, for some reason, you burst a blood vessel over this show, inhale deeply and go, "Urrrrrr.." on the exhale, making sure to growl the R's at the end.