The fact that you defend your nasty personal remarks whilst admitting that you don't don't know how much of their screen persona is true or false says it all really.
Look, I know how easy it is on a forum like this to leap to conclusions and say the wrong thing. It's a false situation, not at all like being face to face with someone (so incidentally is being on TV a false situation). But when people have called me on things I've said on the spur of the moment I've thought about things and sometimes apologised. You and Gillypanda though are both trying to justify being nasty about people you don't know, based on (in GP's case) 10 minutes of a (not-very-good) TV programme. If you read such things about your family or frienRAB wouldn't you defend them?
As Olav has said, the reason that quizzers are NOT arrogant and big-headed is because we all bow to the God that is Kevin Ashman - and he shows the world how to be modest while still being head and shoulders above the rest.