You were out there the same weeks as us, and not all the people reserving Sunbeds were Irish!!!!

But you have a very valid point, it's an absolute pain and it was only after a few days of watching how things worked did my wife (I don't get up early for anybody) decide, if you can't beat them join them...BUT....we only ever done it when we were going to use them at the very, very latest by mid-morning.
One night at 12 midnight we saw a chap creep out and put towels on 4 beds. He was spotted, presumably on CCTV and someone came out to tell him off. He debated with the hotel guy and was allowed to leave them there. In the morning the Pool maintenance man rounded them up and put them in a pile to one side.

So at least someone in the hotel followed the rules.........