This would only work if everybody would ignore him. And this won't happen. So every person ignoring him actually helps him.

Discrediting him publicly is the only real solution (and hats off to COPA for doing that), else he has the potential to do quite a big amount of harm/damage.
Unfortunately this has started far too late, one example being the fact people from the UK being unable to get access to Bitcoin whitepaper at bitcoin.org (by court order).

And I think that calling him a clown and a liar can be a small part we can do, much better than ignoring him.