[treetopsandroofs]

They aren’t simply naysayers.

[treetopsandroofs]

Let’s not feed the trolls today.

[Cboldt]

-- They aren't simply naysayers. --

Here, they aren't contributing much more than distracting noise.

Anyway, affix whatever label floats your boat, contrarian, agitator, etc. My only point was that you will always find that sort, on any issue, and their contributions can be evaluated on the basis of content.