As long as you argue a different point without making it personal, then by all means go for it. And if after some time, the argument reaches the point where it doesnt go any further, then it's best to call it a day, "agree to disagree", and move on to the next topic.

And now about the Godfather threads - surely, there will always be new members asking questions you've heard before. Let's say, a new blood in town that goes by the name "CigarBoy" is asking "Was Michael a bad don? what do you guys think?"

PLEASE dont say stuff like "Oh not again! we had this thread before!" that's a terrible reply, much worse than the actual thread, the kind of reply that will scare new members.

I think a good way to respond is:

"Cigarboy, that's a fine question which has been discussed before. Here's a link to a thread that will answer some of your questions.

Welcome to the forum, Cigarboy!