If a passenger is rude enough to save all those chairs for so long, he/she would do anything. Good policy is not to touch anyone's else's stuff. Once, however, I did move another chair in to the row as there was plenty of room; the people saving the next 6 chairs in the row never returned at all. We were there for three hours.
ALWAYS ask the ships' personnel to handle any situation. Never remove someone else's property yourself. You are asking for trouble, i.e. my earrings were in that towel !! Even though they probably weren't.
The best is when people get angry stating they had saved those chairs.....right before getting off the ship that morning !
I think I had posted a pic of someone saving 14 lounge chairs. Yep, 14. Talk about rude.