There was a one-shot my friend ran for us when we were all home from college on winter break. The antagonist in question was Captain Heroic™! He had Superman-esque powers: brick, flight, super senses, a couple of ranged attacks, etc. He just showed up in town one day and started doing good deeds.
The catch: there was a fee schedule attached.
Help an old lady cross the street: $5
Get a cat out of a tree: $20
Rescue people from a burning building: $50 per person
Stop a robbery: $500 (Mom and Pop store) up to $10,000 (large chain bank)
Fight a team of supervillains: $5,000-$50,000 per villain
...and so on. He even had a toll-free help line: 1-800-HEROIC-1.
It was annoying, but as he and his well-dressed publicist pointed out, there was nothing legally or ethically improper about it. We had no real reason to shut him down.
Until we discovered that he was using his powers to cause a lot of these problems. For example, using his heat vision to start an apartment building fire, hiring villains (through shell companies) to rob banks or kidnap the mayor, things like that.
It was a hard final fight, but it was incredibly satisfying to take that guy down.