Go for it.
There are some specific examples I've had with past posters that immediately come to mind.
One came up with a thread saying FR should have a religious code on profiles like the state pages, and list religious affiliation as "Darwinist" for the freepers who believe in evolution. There was a whole vanity thread about that. I actually gave him the belief of the doubt that he MIGHT be motivated to do so because he wanted to label atheists instead of Christian freepers who believe in evolution, but of course refused to answer whether he considered Catholics who believe in evolution to actually be members of the "Darwin" religion and therefore was requested the mods label them as such. I gave up and left that thread.
Another time a freeper "explained" to me that I was "not a Christian", on the following logic: Christians believe in original sin. If one believes in evolution, then one would presume Adam & Eve had ancestors, therefore they couldn't have been the first sinners and original sin couldn't have occurred with them being cast out of Eden. Interesting theory, though I think just a way to justify their bigotry. It would be like me saying Baptists can't be Christian since Jesus explictly says in the bible that the last supper consists of HIS blood (and makes it clear on this point he's not just being "poetic", since the apostles are repulsed by the idea), and yet baptists deny this teaching of Christ and say the wine is "only a symbol".
And yet another freeper simply pointed that all Catholics are not Christians, we're all a "medieval invention" (apparently all the pre-medeval references to the Catholic church in history, dating back to 168 A.D., were forgeries?) and we worship the Pope, not Jesus, and the fact some Catholics believe in "unbiblical evolution" just proves it even more.
That's at least three seperate posters claiming I'm not Christian, compared to the one you cited.
I find it interesting that all the creationist materials I've found seem to convey that everyone who believes in evolution is an atheist. Is that just a coincidence? For example look at the all the creationists here hailing Ben Stein's "Expelled" movie. In the film he interviews all kinds of scientists who are opposed to teaching intelligent design in the classroom -- and -- what an amazing coincidence -- every single one of them is a staunch atheist. Now, there just happen to be hundreds of Christian scientists who believe in evolution and oppose teaching intelligent design in the classroom, but wouldn't know it -- Ben Stein couldn't find even one of them to interview. Watching his documentary, you'd get the impression that anyone who opposes teaching intelligent design in the classroom is a millitant atheist. Hmmm. I wonder what his intent was?
I, of course, oppose teaching "intelligent design" in science classes (though I'd have no problem having it discussed in a philosophy or theology class). But if you wanted to know my personal beliefs about the origins the world, yes I absolutely believe a higher power is responsible for the creation of the universe, and I believe that higher power is God.