I'm usually an early riser when I'm down there. I enjoy the mornings. On a clear day, I like to watch the sunrise. Other than breakfast, lunch, swimming, etc., you'd find us in that spot all day, until 4 - 4:30. If I decide to sleep in, and get down there late, I don't expect to get a primo spot. But I've never had a problem finding a suitable spot.
Live and let live. I think some people spend too much time stewing over what other people are doing. Is it rude and selfish for someone to take spots on both the beach and by the pool, or reserve a spot and go on an excursion? Absolutely. But how can I know that unless I'm sitting nearby anyway? If I just walk up and see a spot with nobody sitting there, how do I know they're not just swimming in the pool, or in the bathroom, or getting a drink? If I'm sitting there all morning, and someone asks me about a nearby spot, I'll tell them if there hasn't been anybody there all morning. The proper thing to do is to get a concierge to handle it at that point. Nobody should be handling other people's belongings.
Loungers, palapas, etc. are not just for sitting in. They're a home base. We're not there just to sit. We're there to swim, walk on the beach, and generally enjoy the resort. If we have to find a new spot every time we do anything, it simply wouldn't be worthwhile going. Let's say there are four of us. If one goes for a walk, is his/her chair open season now? If I came back, dripping wet from a swim, and found somebody sitting in my spot, with my towels and belongings removed, I'd be ticked.
For those who say they'll walk down to the beach and remove things and take a spot, you're creating acrimony. You're supposed to be relaxing and having a good time. For every actual abuser, there are a bunch of people who just happened to not be there at the time. I've seen loungers go without anybody sitting in them for quite a while, simply because the people are tossing a football or a frisbee around. They're having a good time, which is what you should be doing, rather than getting in a snit about the amount of time someone isn't actually sitting on a chair.