Yeah, that's BS, you ought to run over them.
I typically kayak far from where motorboats are present, but on the nav channel it's unavoidable.
People are just selfish and rude.
I never waited for an hour, but I've waited for 45 minutes on them before. They thought they were really kewl, launching like real boats and backing out like a real boat and floating right in the ramp area waiting for all of their buddies to get going and join them.
I'm not like that, but I used to boat with some dudes that would have found them, swamped them and then tried to drown them with their wake. I'm not saying they should have that done to them, I'm saying they had it coming.