Woah, thats a bit heavy handed, Czuch! You can't end a membership for a man being honest, even if its a bit controversial what he's doing.
Personally, I wouldn't like to play someone who was using a programme, but I'm sure it happens much more than I'm aware of. I think its good that Sumerian tells me beforehand so I have the choice to say I'd rather not play him.
But I do also think that if he's in a tournament then all players should be aware before-hand that someone is using a programme. (Thats the tournament creators responsibility, in my opinion)