I'd say probably not; I'd rather be judged by my in-game actions and behaviour as opposed to the amount of forum posts I have. Can imagine it'd introduce a plethora of unnecessary difficulties, too, especially pertaining to groups and acceptance; "you can't join unless you're (insert rank here)" is bound to happen! While it does sound nifty, I admittedly can't really see it going down too well. Think the negatives may outweigh the benefits in a community like FH's. Personally, I don't frequent the forum-- but I'm active in-game!
It could encourage others to use the forums more, but I think it's rather unnecessary and may be abused by some users.
Plus I still haven't gotten my contest awards. ;A;