Generally speaking, AP's clutter the parks, are self entitled, rude, and are responsible for the lowering of quality within the parks' offerings.
Generally speaking, people are people and people can be rude. I was an AP for most my life, and never once considered it to be a source of entitlement. Most share a similar sentiment. There are always gonna be rude guests, whether they be AP holder's or not. I think the idea that AP's are horrible in the parks is blown out of proportion online. Most go and are unnoticed, but a few bad eggs ruin it for the rest of them.
With Fastpass, they increase wait times as proven by the recent addition of them to TSMM and Matterhorn.
This is something I've tried to debunk in the past, but I'll try again now.
The "it increases standby wait times" is only looking at once piece of a much bigger puzzle, since Fastpass in no way effects the capacity of the attraction. The same number of people are able to get on, some who wait as little as 5 minutes, and others who choose to wait 45. If fastpass limited the amount of people who were able to ride, there'd be a problem.
Let's say Space Mountain and Splash Mountain both have 100 minute waits (which isn't unusual). If someone has to wait in the 100 minute standby line for Space Mountain, if they have a Fastpass for Splash Mountain, they can skip that 100 minute line- which equates to about 50 minutes of waiting per ride. It essentially doubles the efficiency of your queue time.
Or, you can Fastpass every popular ride, limiting your stand by lines to the rides that don't have it- allowing you to do more in the day, and spend less time waiting in line.
So even if you end up waiting longer to ride something stand by, if you're using the Fastpass system you can still very easily come out ahead.
I'd hope that everyone on this forum utilizes Fastpass whenever possible, since it's a free service- everyone has the opportunity to benefit from it.