Yep, that sums up most of the bad sites of the internet for me, I know they are there and some like to take a closer look of the teeth of this animal but I don't have to look at it if I don't want it.
(and on the internet, meaning thread-titles, one even gets an etiquette of what kind of animal to expect^^)
I read your comments (dear community posting on this thread) and mostly I agree with them.
Yes, there are bad people, there are those who only do that anonymously and honestly,
I'm less "scared" about those who post their weirdness online, 'cause that mostly means to me that they found a ventile for them.
Let's take a look at the other side, to those who just dwell on their f*cked up lives and who they could blame or what they could do to get "revenge" at somebody random just for being better.
I'd rather watch something rot, than it rots and I don't know of it until it knocks me down by surprise.
Same with democracy.
I know that system isn't perfect, but I think it is the most suited for people.
And democratic people should be able to handle those who disagree with them.
For those who are going to actually do something criminal, there is the law.
(and no, I don't want to discuss now of what the border should be between a police state and a constitutional state are).
& For those who don't do anything but stirr up moods of easy-to-influence people...
Well, just watch out your friends / classmates / whoever close to you don't become those ill-minded people or get influenced by those.
And for 4chan and reddit, I never really visited those sites, just got rumors.
But like I said, I'd rather watch out for something rotten, than smell it when it is too late.
For tumblr, hm, I hear even less about it than the other two sites...