When you are paying good money to stay on site at Disney, especially at a deluxe, you shouldn't have to deal with more crowded conditions. The pools are sized for the resorts, not for everyone who didn't pony up the money but wants the perks from it. Should you have a less than ideal chair because a someone sneaked in and took the ones at the front? Should you have to wait in a longer line to use the slide with people who didn't pay for it? Would you be OK with people hopping in front of you at Splash Mountain when they didn't even buy a ticket?
Not to mention that every extra body in the pool makes it harder for a life guards to do his or her job and more bodies in the pools means more chemicals have to be poured in which costs money.
No one claimed it is worse than being robbed, that sucks, but if you want to play the "hey worse things happened to me so you have no right to be pissed" game we can go all night. I had my house burn down and two of my cars were crushed by a tree. I had a stillborn baby. Plus my birth mother died before I could find her, I found that out the day after I started a new job and a week later my dad died unexpectedly and I missed getting to the hospital by 15 minutes to say goodbye. Oh and my mom (adopted) has advanced Parkinson's and since I'm sort of an only child (my brother is in jail), the burden of caring for her falls solely on me while I am still trying to raise 3 young boys. In other words you have no right to be pissed because you didn't protect yourself while walking around Epcot.
It's annoying when people tell you what you have a right to be annoyed about, isn't it? BTW, everything I mentioned above is 100% true, yet I would still be pissed if someone who didn't pay for it was using my pool.