If you can talk to them then it’s too close. I avoid people simply because I don’t want to talk to them. Not trying to be rude but usually the other party is talking crazy fishing talk that doesn’t make since or trying to tell you how to catch fish. There is a lake here in the winter fish will stack up on the grates at the dam. Boats will be out there inches apart anchored to the grates and just fishing away. No way no how will you see me there. Only a handful of people I would fish close to and that’s simply because they are great friends and great fishermen.