skateboards that cause problems

I was driving home today on Congress, turning right to a side street, when a person on a skateboard rode out in front of me. I honked and him, and he yelled profanely back that he was at a crosswalk.
For those unaware, it is illegal to ride a skateboard on the sidewalk on Congress Ave between the river and the Capitol, on 6th between 700 East 6th and 1200 West 6th, and on Guadalupe between MLK and 29th street.
I probably shouldn’t have honked, but he shouldn’t yell at me when he’s the one actually illegally.