My permanent boycott list currently has three entries (I count Wal-Mart and Sam's Club as one):
Well's Fargo: Personally screwed me in several ways.
PM me if you'd like the gory details. Wouldn't bank with them if they were the last bank on Earth.
Sony: Repeated data breaches, trying to sell malware-infested CDs to combat "piracy", suing people for hacking their own PlayStations (after Sony took away features people had paid for, like OtherOS) and being entirely unapologetic about it.
Wal-Mart: They've done too much evil to too many people. Their whole business model is predicated on screwing people. Beyond redemption in my book.
Sam's Club: Owned by Wal-Mart, and boycotted for the same reason.
My temporary avoid list:
- United: After they bought Continental, everything has gone to crap. I might give them another shot if they actually start caring about customers again, but I'm not holding my breath.
- McDonald's: I'm not a big burger guy in general, but McDonald's tastes like the container it's served in. Notable exception: Good milkshakes
Honorable mention: The TSA
I fly when it's impractical to avoid it. And I let pragmatism win out over principles and went and applied for NEXUS membership. Even so, between security theater, long airport lines and cramped accommodations on planes once onboard (I'm 6'2"), I will generally opt to drive rather than fly, even if it takes an extra day.