I also frequent some other sites and have never heard of such a thing and I also spell it colour. The only time I was threatened with being banned from another site was when I didn't want to give my whole life history in my profile and then repeat all aquarium details twice over in my signature.
I do however have a tough time with posts that are very hard to read due to their poor spelling and/or grammer. I sometimes spell things wrong too but some posts are just so bad I don't know what they're talking about. What ever happened to proof reading?
It also seems that some think that just because some particular words sound the same it doesn't matter how you spell it. I'm here to tell you, it does matter!
Here is a very small example:
to, too, two. there, their, they're. by, bye, buy.
I could go on but I know it's no use.
I will stop my little rant now.
Bottom line......I heart canreef too. There is nothing else in Canada that even comes close!!