All NOBO thru hikers be extra careful if you visit any of Georgias heavily populated areas before departing. There is a serious case of the flu (ass blasting syndrome) going around that lasts forever (i've had it for the past 5 days and it's still not getting much better). Many of my co-workers, friends and relatives have had it and they felt the symptoms for at least 10 days. The first day after inoculation isn't that bad except for the upset stomach, headache and fever. The second day seems to involve a bit of vomiting, more headache, more fever and explosive diarhea. The third-fifth days are mostly just peeing out of the ass w/ little forewarning of the event (don't trust farts either). Bring excess TP on the trail if you suspect you may have it becasue you will damn well need it.
It doesn't exactly grease your ass like that olestra thread, but it makes your poops look like tan baby food. Also, the poops give about a 30 second warning before they release so beware and do lots of preventative maintenance. I'm fortunate not to be on the trail right now in the condition i'm in, otherwise I might have to have taken a week or more off from the trail.
Wash hands, stay away from the sick, don't share syringes and you should be fine!
That's my two cents on the matter!