Casual hammock camper here.
So I have been hanging my hammock using this kind of a knot I figured myself out at some point (anybody knows what it actually is formally called?) without any issues, it can be easily undone by pulling on the free end yet it never tightens under a heavy load. Tree trunk goes in the big loop.
But recently I had an outdoor try hard nerd friend of mine say it's a very unsafe knot. Can somebody confirm this? I don't see the problem.