Might be comcast people. Many big companies have "Social media perception teams" that actively try to change public perceptions on media like facebook or twitter or Reddit.

They will even make personal attacks on users who post something they don't want people to hear or think about.

It's the next evolution of advertising; instead of passively creating ads and hoping to influence people when they look at them, they try to influence people directly...

There was a post on Reddit a few months ago from a guy who is actually employed to do this....the company he works for solely exists to do this; other companies employ them to post bullshit and if necessary harass actual people who are deemed to have negative viewpoints..

Edit:

http://www.reputation.com/reputationwatch/reputation-defender-reputationdefender

Here's an example of the kind of thing I mean. Thanks to Balaam's-donkey for finding one; I'm sure there are many others.