One day I was in the pool earlier then the usual gang of us and someone had left towels on four poolside chairs. It wasn't an issue as the pool never got crowded and they never did show, but we sure had a good time making jokes about saving chairs for each other.
If it had been an issue of someone needing a chair was being denied one while 4 remained empty, I think i would have moved them to the fence or brought them to lost and found. After all we elderly people need to sit and who's to say they weren't forgotten there.
While we're on the subject of pools I have a hard time with people who move a chair so close to the shower to get the sun, that I can't rinse off. I'm tempted to say excuse me you might get wet and use it anyway.