It depends on how far you want to take your refusal to do business with companies, and for what reasons.
I.e. ...Dicks sporting goods removed all of their "evil black weapons" right after the shooting.
So people are refusing to do business with them. they still sell the ammo.
Paypal, wont allow money transfer if it has anything to do with guns or gun accessories, including ebay. (even thou people get away with it.
left side of page, places to avoid