There are a number of different personal reasons, one of which is expense. I'm also quite good at losing and breaking things. There are other personal reasons. I do have a semi-smart Tracfone, but it's a flip and the display is too small and the phone too slow to use for that purpose (good for scores though). My wife does have one, which we have used for a Crew game. But she does not like baseball.
The other issue is the more that I have to jump though hoops to attend an event is when I start saying "no thanks". That general reason (at the time (2013), increasing cost, travel, hotel cost, extra security, and extra "donations", among other items) is why we are no longer season ticket holders at Penn State--and in fact have only been to a couple home games since then. We found it was easier and cheaper to go to Europe for a couple weeks every couple of years.