No offense taken here.
I do, however, have no problem with judging people unfamiliar with the sea or seamanship. Landlubbers they all be, which may include the yo yo liveaboard that has never removed the docklines.
The liveaboard vids above are very interesting. An amazing collection of junk aboard the first couple, it seemed. No way they ever leave the dock. I would definitely find another marina, if I was tied up next to any of them. Easy to see why marinas often discourage the practice.
We have several full-time but seasonal liveaboards (May to Oct) and you could never tell. The only exception is a folding bicycle left on the dock, in front of one. (even that bothers me a little bit)