So that's interesting -- I left a comment on the stickied thread, and it doesn't show up in my comment history on my profile. It also doesn't show the thread's karma score in my recently viewed history.

Already shadowbanned, or am I paranoid?

Edit: It looks like any comments from the stickied thread don't show up in the users' histories. I guess this is just a thing with announcement posts, since comments on the other threads show up as expected.

Edit 2: Aaaaaand it's gone. Holy shit.