Rest of us might fight and squabble all the time. But none of us are fugging scumball scamming theives.....
Remember how village residents used to get together and stone criminals / rapists / thieves?
That's what needs to be done. If Rick won't ban the scammers, then the populace should start by shunning them and calling them out every time they create another listing.
We try too it seems at times. But the theives just carry on.