Kankama said..
Valo - if my boat was there I would jump aboard, often do to secure booms, topping lifts, reduce chafe, secure unfurled genoas etc. I always jump on board derelict boats to remove seagull nests before they hatch chicks.
I also have looked on boats that just look wrong and have sometimes found out that someone has stolen something or had some damage done. The owners like you for having a check. The one time I didn;t a mate's boat was open and he wasn't around, I later found out some scum had looted his boat and the washboards werent in for the next rain storm. So have a gander and fix it up - gently and carefully, then find out who owns the boat and let them know.
If it is especially bad, like a flogging genoa, I ring Waterways and have a chat and leave my number. I would hate it if someone went past my boat and didn't tidy it up. You would have to be a mongrel to try to sue someone for doing the right thing.
I have jumped on board people's boats and let out more anchor rode when they dragging unmanned. Do unto others and ignore the bastards who make us worried about doing what we know to be right.
cheers
Phil
+1