Join date isn't everything... I've seen people who joined in 2003 ask "can i haz buy tis snipar from teh us of a?"
I did say a few times "I think", and when I say it, that's because I'm 99% sure about what I'm saying, but that a confirmation would be a good thing.
Exemple: AFAIK BuyAirsoft are faggots. I never bought from them, but I'm quite sure they are.
Everything isn't black and white... But agreed, some people who are totally clueless and use the excuse of « but I said "AFAIK" before! » to get around the retardedness of their answer are bothering as f***.