Or conversely, people insisting that I accept something that I find unacceptable, and yes I'll speak out against it, and I won't be tolerant of it. Why should I be? If I feel that a certain philosophy is inherently destructive why wouldn't I speak out negatively against it? As long as I don't go into anybody's house or private space and voice these opinions, and as long as I'm voicing them publicly, WHO GIVES A FUCK. No, I don't have to tolerate it quietly. I won't.
It's not even a matter of "sensing when" or "how" to voice one's own opinion's, because I have a perfect sense of that...IN REAL LIFE. In real life, I mainly mind my own business or avoid people I strongly disagree with, unless I think something truly destructive is going on. I don't see why I have to act that way on-line, why I should make myself as small and sheep-like as possible, in a medium that is a free flowing exchange of ideas, where someone might VOLUNTARILY listen and agree with me (note that I'm not screaming at them, or knocking on their door, or emailing them privately with my own beliefs).