Legally, you can do a lot more than ignoring. If you have any talent for it, becoming an activist (say a youtuber) rallying people against whatever you believe is bad, can be pretty powerful. A single person (again, with some talent for public speaking etc.) has a real chance of making meaningful change this way.
Rallying people to do what? Boycotts? They have some effect, but never enough. The most influential YouTuber I can think of is Louis Rossmann, and you know, he's not a YouTuber, he's a MacBook repair guy who took up YouTube.