There were a couple of times I had no choice this year but to go through Ticketmaster because they were the only times when the day & location aligned. I had little choice when booking an Iron Maiden ticket, or a ticket to two Dream Theater shows. I generally avoid Ticketmaster when I can and when it is convenient enough to do so, but I'm not going to idiotically avoid going to a show I want to go to and sacrifice enormous time & money to not use Ticketmaster.

The reality is that Ticketmaster is largely immune to a ticket purchase boycott - their involvement in owning venues mitigates the effect of a boycott because they're the only way to see a huge swath of entertainment.