Yes. It first became apparent in various Middle East-related subs. Participation in any "undesirable" or "enemy" thread would get an account banned in all the "friendlies" (much like how passport stamps work over there), and due to the power and pettiness that some mods have amassed, this could become a site or shadow ban.
The shadow ban is truly insidious in its dishonesty. It may have been a way to combat bot recognition at first but that was long ago cracked. What we have now is a site eager to cash in and clearly having made the decision on how it will do so: through the highly vocal, easily offended SJWs. The lessons taught by decades of evolution witnessed in USENET, Slashdot, kuro5hin and others are being ignored.
I'll go out on a limb and call the ouroboros flame-out and decline here, to become more visible by late '16. The offense grows exponentially, as does the self-entitlement, so it's going to be a bumpy ride. At that point figure some of the advertisers finally getting tired of the blackmail and other threats because they didn't send a private army to take on some AC for a joke that wasn't moderated away inside 30 sec. Whether reddit will recover will come down to whether the SJWs manage to retain control.