One of the basic tests of whether what you do is good or bad is whether you can imagine, having done it, going home and saying to your parent(s), partner(s), kids or friends "hey guys, guess what I did today?" Or as Louis Brandies most elegantly put it, "sunlight is the best disinfectant". Things are done furtively in the dark that no-one would be willing to own up to in the light of day.
On Friday Laurie Penny kicked off a debate about misogyny online when she pointed out that for airing her opinions she is regularly subject to threats, abuse and all sorts of hate from anonymous - presumably male - commentators. Many other women have since commented that they have been subject to similar abuse. The fact that women say things apparently drives some men into a violent fury, and many websites give them the option of venting that fury through anonymous trolling.