We had a similar problem on the Magic last fall. It was fall break and a sold out sailing. My MIL, my Mom, my Dad and my 2 sisters and myself were at the Mickey pool with my 2 boys. We had a group of 8 but took only 2 chairs since we could share and we were taking turns in the pool with the boys. My MIL stayed in her chair all day and was reading and such.
Well both of my sisters got in the pool to watch my sons so I could use the restroom and my MIL was still reading in her chair. I went to the restroom. While I was in the restroom my MIL got up for a few minutes to go get an ice water from the drink station. In the few minutes it took to do this she came right back to our 2 chairs and a "couple" had dumped our things (3 tote bags, towels, toys, sunblock, hats, MIL reading glasses and a open book) off our 2 chairs.
I came back from the restroom right after it happened and saw my MIL just standing there in shock. I asked her what was wrong and she told me and I saw our things in a pile. I told the couple in a very nice way there were 8 of us using the 2 chairs and I had run to the bathroom and my MIL was getting water from the drink station. I asked why they had taken our chairs and dumped our things off?
Anyway it got ugly and this "man" yelled at us and it was really awful...............he really made a fool out of himself but it really embarrassed us since we had done nothing wrong. I personally dislike "chair savers" and we had not done that. In fact we had been sharing our 2 chairs with 2 of us in a chair talking, eating etc.
My Dad came over but the guy was already yelling at me and I wished my DH was cruising with us because I felt scared which sounds silly but come on the "man" and his wife had thrown our things off the chair after being gone less than 5 minutes. In our case there were a few other people around who took up for us and told this couple to chill out or they would call for security (which I had not thought of).
Anyway the rest of the cruise this "man" did everything he could everytime he saw us to say something very loud and rude and so did his children. I guess it is how they behave at home but is was a little scary.
My 2 year old had come out of the pool with one of my sisters and was crying because he did not know why that "man" was yelling at us..............I did not yell back but I was adamant that what they had done was rude and just wrong.
I could have let it go and let them have the chairs but we had done nothing wrong.
I am sorry this happened to you. I think 2 chairs is too much but 30 is just silly that is one whole side of the pool.
B&W Mom