I always just leave the spot and think this is the best option, but was curious to see the answers and if there was some accepted standards.

I said hey to the first guy and he did not respond, haha, but to be fair I fish too long and for too many days in a row, so I look and sound pretty rough, when I am on the water.

I think this thread would be cool if some tournament situations were posted about whose spot it is and of course it would be funny to hear some of the "encroachment" stories we all have.