re: Are there any brands/places that you truly boycott because of what they advertise or sell?

No, but not really intentionally. So far, nowhere I frequent or do business with has done or said something stupid enough to boycott. (I don't go to Target, don't drink Bud Light, etc.)

I am not opposed to boycotting a business, but there's definitely a scale in regards to how important the product is to me versus how important to me what they did/said is. Everyone supports companies in one way or another that have done something we morally don't believe in, unless they live in the woods and consume nothing.

It's just about picking your line in the sand based on what they did and how much you value what they provide. Nestle did a bunch of horrible shite and became the most hated brand in the world, yet almost nobody fully boycotts them.