A YouTube Tale 

   TWO YouTube channels are run by me.  YouTube is a great resource for documentaries, education and entertainment.  That said, YouTube has a lot of troll content generated by channels whose aim is nothing else.  Such channels "pump" frequently in bulk, trollish snarky posts into other channels videos Community/Discussion sections.  The channel of a troll will typically look just like a real world slum.  There may be only one or two poor quality videos uploaded or no videos at all.  Often, there is just a playlist compiled by the troll to illustrate what their manky tastes attest to.  
JUST DON'T FEED THE TROLLS - Block their Accounts instead - like Any responsible YouTuber