Meh. Call me mean but I don't forgive people who crab at strangers on vacation over stuff like that. Whether they're right or wrong, it's rude and uncalled for, and just puts a damper on the trip. What's the point in being nasty?
I still remember the time a couple of years ago I was at Beach Club, and set my beach bag (which I had kept in the locker while swimming to avoid being an empty chair hog) on a lounger for a moment as I stood next to it and dried off with a towel prior to going inside. A guy a lounger or two away snapped, "Those chairs are taken!" in a very nasty way. Goodness gracious. It's not like he owned those empty chairs for one thing. For another thing, why be so mean on your vacation? He could have said the same thing in a nice way. Being talked to that way darkened my mood for awhile, and that's a miserable thing to happen during your hard-earned vacation.
Off-topic but I've noticed that kind of thing never happens when I'm in the company of my 6 foot 2 inch male S.O. Only when I'm a female alone (& I'm pretty simple and plain-looking, not someone who would impress or intimidate anyone). Some people are just bullies, and if they think another person is weaker/lower status, they don't mind being aggressively rude even though they'd never do it to a stronger/higher-status person.