I'd be thrilled to have ANY locals
(good or bad) on the CB these days. 35 years ago we had easily 200+ locals on the air every day. Now it's just me and 2 other guys. The rest of my "locals" are 25-60 miles away and requires using SSB to talk to them.
Do what prcguy suggested. Get even. Have fun with it. Pretend you don't hear them and that you're talking to somebody else every time they key up. Just talk to your "imaginary" contact, ignoring the other guys, and maybe toss in a "i got some local yahoos trying to talk, but you're walking all over them". That will surely get them all wound up.