Others just walk away for 6 months or more, hoping for the best or not thinking at all. A short walk down my home pier found these fine examples within just 8 boats. Some will "move" on their own before spring unless I retie them... and I may. Self preservation is a part of my motivation. Some is altruism; I would hope someone would do the same for me, though I don't expect it. Is there liability? Not unless I do it wrong and leave a note.
Springline over the anchor. This is tight at low tide. The water here will rise as much as 3 feet without a storm, just the tide and a south wind. Really, this anchor should be removed from the roller if the slip is this tight.
Port and starboard chocks are reversed. Better, he needs straight chocks and chafing gear too. He saws through several lines each year but won't fix the chocks. Someone replaced this line (a dock mate) a few weeks ago, so it's not bad yet.
A crying need for chafing gear.
A washcloth, probably old, for chafing gear. Fortunately, the edge is so smooth and it won't be tested.
A rather short tail on this knot. Under any real strain it will pull through. Rock climbers are taught to tie a back-up knot, typically a double over hand, with the tail. This forces the climber to leave a long tail when tying knots. There is a similar rational for always breaking matches when hiking in the woods; you have to wait until the match is cool.
What can you find on your home dock? Check your neighbors, before you find them sliding through the marina on a windy day.