#1 Senna does indeed (or did) own. I would have loved to see some AS/MS battles in the late 90's and 2000's. Perhaps the Ferrari dominance wouldn't have been what it was.
#2 If people are that petty they want to go dig up old threads and say I told you so I think they should just get banned. Simple as that.
#3 people will probably pop in to ask questions about stuff that is explained in the user's manual, but such is life. I agree with Jedi that the interesting discussions will either take place after the japanese release, or about a week after the U.S. release because we'll all be too content playing to sit down and type on GTP.