When you share, or repost something you find horrible or rude, it creates more links to it- making it more relevant in searches online, so that even more people get to find it.
Let’s say you have tattoos, and have just read an article saying that people with tattoos are scumbags.
Don’t link to that article, repost it everywhere, talk about it, give it attention- because it makes that result rise higher in searches for “tattoo”, you see?
And if you find something you agree with, that you like- well hell, share that link. Reblog, follow, add, share, twit, whatever it is that you use or do- share the good things around. I’m through paying out attention to things that don’t feed my mind and to derivative shit. Spend your attention wisely.