Yes, it happens in every channel Sigyn is on. I saw it. notably in #freenode-policy-feedback (which is now moderated)

    063901  <iovoid> rasengan, are you planning on meaningfully answering? So far your only two replies about the article were "Nope." and "Nope."
    063901  iovoid (iovoid@hellomouse/dev/iovoid) left IRC (Killed (Sigyn (Spam is off topic on freenode.)))


    063922  <ByteMe> rasengan: they won't trust easily, and exerting more control over channels than previous freenode staff ever did won't help bridge that gap
    063922  ByteMe ([email protected]) left IRC (Killed (Sigyn (Spam is off topic on freenode.)))

    063931  <eno1> rasengan: test ping
    063931  eno1 (iczero@hellomouse/dev/iczero) left IRC (Killed (Sigyn (Spam is off topic on freenode.)))

Edited: by the way, Sigyn is freenode's anti-spam bot

Edit 2: if you have doubts that 'rasengan' is the trigger:

    064338  <Wolf`> RASENGAN!
    064338  Wolf` (~OhGodAPet@unaffiliated/wolf/x-5089230) left IRC (Killed (Sigyn (Spam is off topic on freenode.)))

    064341  <rasengag> rasengan
    064341  rasengag (sid11717@lykos/Iciloo) left IRC (Killed (Sigyn (Spam is off topic on freenode.)))