I can't boycott Target since I never go there anyway.
Then tell others not to go there.
Then what you need to do is go there, pick up some expensive items, get to the register, and when they ask you whether you found everything all right, you say, "Where are the Christmas trees and the Salvation Army volunteers?"
When they say they don't allow either, you say, "Oh. Never mind!"
And leave with a smile.
Dan
(c;