EDIT: I added some more quote to make thing less ambiguous.
I'm just gonna leave this quote from Winston Rowntree here, because it's relevant to the subject (replace sexism with harassment):
"Very little makes me more pissed off than gender prejudice, but what do I ever do about it? Pretty much I just assume I?m not part of the problem, so enjoy your hive of scum and villainy, everyone, I live on a higher plane. And here you have by far the worst response to sexism: nothing. The response of choice of we who love avoiding confrontation (and comment section shitstorms). And so transgendered people continue to be disproportionately persecuted because not enough people are ensuring a supportive environment, and women continue to get chased off Twitter because not enough people are ensuring a supportive environment, and rape victims continue to not be taken seriously because not enough people are goddamn ensuring a supportive environment. The ability of the Internet to make it seem like there are more assholes than there really are is allowing such bullshit to run wild, and the people who do speak up get hung out to dry by the silence of others. Not enough of us are making it clear that this is the world of the majority and not the vast minority fringe group of idiots, and so the one shithorn talking in the theater ruins the movie for the other 76 people who are afraid to speak up. Peer pressure is what drives humanity. Why aren't there any women/men in certain industries? Because the absence of women/men there keeps the others away. But we can harness peer pressure for good, too, and remind sexists that they are alone in the room -- especially online, because a tidy neighborhood discourages crime, and this is a neighborhood that needs a lot of fixing up."