We tried to use one at POR last year but there was a family there with kids shrieking non-stop and we gave up. This last time we tried again but there were two adult males (with lots of kids between them), the kids were fantastic, playing and having a good time but bothering no one. However the men stationed themselves one at each end of the pool (lengthwise) and threw a football back and forth between them, thus cutting off the entire pool from anyone else using it other than to be jammed up against the wall. Unless you wanted to risk getting bonked in the hed by their football. I had to ask them to stop so I could get my mother to some stairs so she could get out of the pool. They had all stairs blocked and she's 80, she couldn't haul herself over the edge.
For some reason POR is the only place I've run into this kind of behaviour.