I agree and you need to let these people know you can't just pop up on any frequency you wish and start communicating without prior authorization from the repeater or license holder.I would get them off of the repeater as soon as possible since it is your responsibility to maintain your repeater.I would tell them if they continue that you will file a complaint with the FCC for unlicensed use and shut down the repeater until it is resolved. You said a few hams were also involved so I would let them know their ham license are in jeopardy and it does not cover them on any other band nor GMRS contrary to what they believe.I do not understand the reasoning of people these days,they think since it is there it is a free for all but yet a good bit of the public have that general assumption...William