I have several life long grudges against certain companies for what I consider mistreatments. Here is my list, what's yours?
1. EA Games!
2. Lowes!
3. Sonic!
These are the top 3 of mine. I will never do business with these companies.
Sears
Bought a fridge and they told me I could price match of price went down. A week later it went down $50 in price. Went to get price match (499 from 549).
It was a Friends and Family night so hey couldn't hey said. . Bear in mind it wasn't as though u needed an invitation as anyone could get that discount.
I've spent about 5-7 k on appliance since then and I've influenced my parents and family to shop elsewhere.
Fuck Sears.
Northern factory workwear, those cunts. 
myee8 - Anyone who does halal.
I'm surprised that PETA hasn't rallied against it. Torture way of killing an animal.
If course since it's an Islamic practice it is hands off
Also Best Buy for years until they price matched Amazon
The bastards wouldn't let me buy a laptop without their "optimization".
myee8 - Anyone who does halal.
Ok? That's weird.
"Hal?l (Arabic: ????? ?al?l, 'permissible'), also spelled hallal or halaal is any object or an action which is permissible to use or engage in, according to Islamic law. The term covers and designates not only food and drink but also all matters of daily life."
I thought mine were strange, had to Wikipedia this one.
Sears for me too...ordered a washer/dryer online one black Friday, they contacted me a day later saying they ran out and could not fill my order. They also would not sell me a comparable set for the same price. No more business from me. 
Why Sonic?
Yamie Jagerbomb - Also Best Buy for years until they price matched Amazon
The bastards wouldn't let me buy a laptop without their "optimization".
Yes, Best Buy generally pisses me off, but never had the need to boycott them.
all the airlines at one time or another
cruedi - all the airlines at one time or another
So you don't fly? Boycott is you don't use their services during the time of the boycott. What happened?
Reebok
Toshiba
Roku
Apple
Lenovo
TheTurtle - Why Sonic?
When I was 5, I ordered a burger with no onions. It had FREAKING onions on it, and my fuck head babysitter made me eat it! "Don't waste food".
Fast forward, we (my family) were on a road trip and everyone was hungry. I gave in to their pressure and stopped at a Sonic to feed the family. I ordered a burger with no onions, THE GOD DAMNED THING HAD FUCKING ONIONS! 36 years after the first boycott they did the same fucking thing! I was pissed, and I really fucking hate onions!
UGCTT_Fillthy -Yes Monster is terrible.
Monster Audio.
make shitty products and sue everyone.
and Team Lloyd Irvin.
#1 is Comcast
UGCTT_Fillthy -
Monster Audio.
make shitty products and sue everyone.
and Team Lloyd Irvin.
I really have to know the story on Team Lloyd Irvin.
Muratus -What the fuck man! Add a trigger warning to shit like that.TheTurtle - Why Sonic?
When I was 5, I ordered a burger with no onions. It had FREAKING onions on it, and my fuck head babysitter made me eat it! "Don't waste food".
Fast forward, we (my family) were on a road trip and everyone was hungry. I gave in to their pressure and stopped at a Sonic to feed the family. I ordered a burger with no onions, THE GOD DAMNED THING HAD FUCKING ONIONS! 36 years after the first boycott they did the same fucking thing! I was pissed, and I really fucking hate onions!
IDOHARM - Northern factory workwear, those cunts.
Again have to hear this story!
Target
Culvers