[lxgr]

My point is that using digital signatures in that type of pseudonymous/anonymous forums probably achieves less than you think it does, but maybe I'm not clear on what that actually is.

The only benefit I see of publishing a public key there is giving other readers an out-of-band way to privately communicate with you, or yourself a way to establish continuity of your pseudonymous identity on other platforms. You'd never use it to sign anything you post on that platform itself, though, as that wouldn't serve any purpose.

If that's what you mean, I think I agree :)