To Close For Comfort or "OMG" Theres a boat on our butt!

Tom and I were asleep when I heard a clanging noise and Peanut barked. I shushed her but about a minute later she barked several times more. Tom woke and said she must be dreaming. I disagreed, Peanut doesn't bark without reason. It was barely light out and I leaned up and looked out the port hole on my side of the bed. I then yelled "Holy Shit" the guy behind us is pushing off our boat with a boat hook!. Tom looked out his window and yelled we'll be right out.  It was a rental catamaran that had anchored uncomfortably close to the front of our boat the day before. We were not happy about it but what can ya do?  Overnight the winds died and the water was now flat as a pancake. The boats had changed direction and his boat was now directly behind us. He was standing on the front pushing our dinghy( which is tethered behind us) off his boat. I rolled up the plastics on the back door and said good morning. Sorry to wake you was his reply. Ya think?  Tom went out on the bow and pulled up about 30 feet of our anchor line. We then asked the gentleman to back up towards a large spot between two boats behind him. He backed up alright, straight back toward another sailboat! Now awake and still uncomfortable with the situation we sat up on the fly bridge with a cup of coffee and watched the sun rise.  About an hour later the sailboat decided he was to close to the other sailboat behind him so he moved forward... you guessed it right next to us again. What is he thinkin? He was so close I could tell that the game two young people were playing on their deck was chess! We knew that at least two sailboats were leaving the harbor this morning so we just waited. When they left we pulled anchor and moved far away from the rental!  Later, while walking near  the beach a gentleman approached Tom and said " I hope you don't wake up tomorrow morning and have to yell "Holy Shit" there's a boat on our butt. Guess he heard me! They laughed and we figured out the problem. We had 75 foot of anchor rode out. He only had 30 foot.  There in lies the difficulty with anchoring to close to your neighbor. You never know how much rode they have out compared to you and you could end of in a situation that is "To Close For Comfort"!!