Thanks for your contribution, S7, but I still remain with my conviction that Serious was correct because in the context of his sentence he is describing a specific group (of his own construction). Whatever. I always say that grammar only matters if its misuse mangles up meaning.
Mr Navy, for example, slags himself off unnecessarily on his grammar. I almost always understand what he is saying despite a few small mistakes. He's certainly among the top 10% of posters on here for plain English.