@ericwyman said:

List of things that ruin my experience.

People who crowd into rows when security kicks them out of aisle
People who wave their friends into said row without space available
Pukers
Beer spillers
Anyone who consistently hits/bumps/nudges because his "dancing" is out of control
That "foul plastic smell"
Talkers
Shouters
Conversationalists

The use of technology and electronic devices is not an issue.

......for you.
to me, the proliferation of these glowing screens in my field of vision, and the growing number of people who are more focused on their screens than the stage, is an issue, along with all those other things. And don't get me wrong, I'm not about telling people what to do or not to do, but I will always insist that the quality of attention brought to the show by each and every audience member has an impact on the show. Thankfully the majority of Phish audience members are there because they love the music.

But to each their own.