When FlyerTalk was first migrated to vBulletin, a Reputation feature was turned on.
However, this feature caused a lot of problems because of its being abused. People were attacked by others who simply disliked them and eventually the feature was turned off. (There is a lot more to this story than I care to relate here. Perhaps some on this board will share their experiences.)
So, I wouldn't put any stock in such a feature; it wouldn't necessarily be helpful.
As for using it to decide whether to "meet outside FlyerTalk," you must be kidding. Over the past 3-1/2 years, I have met some 250 to 300 FlyerTalkers in person and count some of them among my friends. A reputation feature would probably be WORSE than useless for this purpose.