Well, if you consider that maybe 1 in 10 is aged 7 or under, and most of them know very little about geography... and then add the ones aged 8-14 who still know little about geography... and then those who really should know better but don't... it's not hard to come up with 1 in 10 people not knowing who the president is, where Canada is, or whatever.
Equally, you could come up with similar stats for people in the UK not knowing who the Prime Minister is, etc. Just because you don't like the idea, doesn't make it untrue. The figure is as likely to be completely pointless as it is to be true, though.
I don't think it's that great an idea to make assumptions about how someone will play based on where they live. However, if you factor in the time you're playing, then you can surmisie people from some areas as being more likely to be playing more hands because they've only got their lunch break to play in, or it's the time of day when people will be coming home drunk and having a game, so you can possibly use the current time and their location to come up with a possible situation in which they're playing and see whether their style fits that.
For playing the obvious junk hands like 7-2o, generally I won't play them. However, if half my chips are in on a blind then I may be forced to gamble. Also, in a limit cash game, if you sit down and play a couple of junk hands very early on like that, then you may get people to peg you as a loose player, and get more action with a real hand. That said, this probably isn't worthwhile in a loose, low-limit game when not enough people will be paying attention anyway. In a No Limit game, they can be playable occasionally, but basically only when you're on the button and nobody has entered the pot, so it's just you against the blinds, where a raise may just take the pot there and then. Even in that situation you only want to do it occasionally otherwise people will know you're just stealing and call with a better junk hand.