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I can't boycott them. I would have to buy and use their products to be able to boycott them.
This creates quite a dilemma with not a reasonable outcome for me to look forward to. Occasionally someone I'm with will want to buy and use their product while I am with them.
Say I'm happy driving and someone in my car says, look a coffee shop, please stop so I can get us all some coffee.
Hey, I've got good news, I've found a solution! That personal moment with friends outweighs the minuscule difference it might possibly make in the real world if I were to vent my personal feelings in such a way that it left my friend feeling like I was being an (^*&$) to unkindly refuse a cup of coffee to sip with my friend, that they had kindly offered to me.
I will continue to graciously accept and exchange pleasantries and kibble mints with my friends, without it becoming a war time discussion with a pressure campaign being imposed upon my friends by me.