Well, in my opinion, it's always been a mistake to purge dissenters. Much better to demolish them with argument. But that isn't exactly the prevailing practice here.
If I were the webmaster, anyone with different opinions are welcome, but he must be coming to our site, and willing to commit dialogues with our side "in good faith". Since it is apparent many of the Euroist posters are not coming to dialogue but to evangelize, I have my reservations as to whether to extend red mats to them.
But of course I will leave the whole matter for Mr Robinson to decide, since this is his site and we are guests to his forum.