This is exactly what paid trolling looks like.

There's a difference between disagreeing and sowing contention. Between being a part of the OKP community and purely pushing an agenda. Membership here is not a right.

90% of his posts look like "Did you see this? *posts link*. Very disturbing!" it is absolutely cause to raise an eyebrow.

A ton of "95% of people haven't heard this" and "Those in the know believe this".

Many of his weakly-sourced links are posted here just hours after they've live on the internet, including those in this post.

In combination with the join date, post frequency, etc. I think the onus is on reaction to show he's here for anything other than pushing an agenda.