Have you read so many negatively-toned posts about a person, a group of people or a topic that you've slowly begun to side with the subjects

Tough question. I'm trying not to. Unless they are against me, then I'll sign on immediately.

"NEVER! Not in my lifetime!"

No.  If anything that would cause me to write them off and ignore them as haters beyond the reach of reasonableness. 

One can always ignore these negatively-toned posts and remain neutral. I know it's an impossibility as far as humans are concerned.

Sometimes I can just ignore them.  Other times I find myself annoyed because I end up defending someone I do not particularly care for simply because of the utter BS that is spewed.  Always I find myself amazed that people allow those they despise to move into their minds and live rent-free.  Admittedly I've begun hoping he does good things (which I hope for all presidents) in part just so I can enjoy the meltdowns and exploding heads.  

No. My views cannot be swayed by obsessive partisan ranting. I tend toward feeling pity that the hater has nothing better to do. 

What gets me more is how some news casters have become so partisan.  They are supposed to objective.  They don't change my opinion, except for my opinion of them.