[banachtarski]

The notice to the individual need not be overtly public-facing. It could just be a dialog between the conference committee (who should care about the quality of its attendees) and the person in question. I personally would also prefer less public vitriol everywhere.

[tiredofcareer]

Okay, sure, but at that point why not just do it yourself? You're basically saying "I can't handle this myself, can you talk to the guy for me?"

[banachtarski]

Who's the "you" in your sentence?

The original poster? I really don't understand the point of your comment. Bars have bouncers for a reason.