Time to rigorously boycott Intersango and the "Bitcoin Conference" then?
Please don't boycot and hurt the conference over this. You're just hurting Bitcoin as a whole.
You have missed, that it could be BitBusters (and quite a few others) agenda to actually hurt Bitcoin.
And that should be an even greater reason for all of us not to boycott it.
The Intersango guys should probably think about whether their attendance would be disruptive to the conference as a whole though.