I don't care about your purpose, I only care about how it makes some people feel.  If you're going to post something graphic, descriptive, or something that could trigger flashbacks or anything online and your account is connected somehow (via following, facebook friends, or whatever) to someone you know or even don't know who has dealt with what you want to share to make a point like "all men are evil," then you have to reflect on who you are as a person and how dire it is that you share this piece of information.  Is your point so important and "accurate" to prove that you need to put someone in harm's way?  Do you really need to post that video of someone being run over or shot, or killed or wounded in any way?  Do you really need to share that person's **** story?  Do you really need to post that picture of someone's hanging?  Do you really need to post any of that?  If you really feel the need, AT LEAST - okay?  at least? - put it in your settings that someone you may know who is sensitive to whatever you want to post doesn't see it.  You want to make the world a better place?  Maybe start thinking.