This is not boorish behavior but on our last cruise there was a large family group on the Dream who would always send emissaries out early to stake out about 12 chairs. For the entire cruise, this family group held onto this prime section between the kids pool and funnel vision. There was always someone in the chairs and everyone came and went, but there was never a time (that I noticed) when all of the chairs were occupied. So they were pretty much within guidelines but at the edge of acceptable chair holding. I thought it was a shame that all those families with little kids (including us) didn't have a chance to enjoy those seats. But it was just me, DH and our nephew, and we chose to have fun together than splitting up to get the best seats, etc. My personality is such that I would think, oh, if Aunt Sue is not going to be back out today, let's let that sweet family that's looking for a place to sit have those chairs - pixie dust for them! Their attitude was these are ours and we will fight for them if necessary (you could just tell). I know there are threads that go on and on about chair holding so not trying to start one.
Regarding money and value: If I spend this much money for a
Disney cruise, I'm gonna be darn sure it's an awesome vacation. That means nobody's going to steal my shine and no bad service is going to touch my pixie dust. That's a mental mindset. It's not a threat. Why would I spend so much money and then let someone else ruin it for me? I can't control what other people do but I can control how I feel about it. That attitude won't solve every situation but it goes a long way.