If possible (but I don't know if it is the case, because as for what I know the games are archived all together on the site, they aren't sorted by category) it would be a REALLY nice feature. But as Liallan already said, it will be a nonsense in some games
To do some exemples Battle Sheep has a theorical top score, 16 points, easy to reach and sometimes when you play a great game you don't reach the maximum 'cause playing better will limit your opponent's score , and so yours. In some games winning give you 1 point, and losing 0 so not much chance to do high scores

Or in some others game playing in 2 players can allow you to reach higher scores than playing in 5 players, and so on.
To answer about the RFtG question, it's an unusual score but surely it isn't a record. I personally scored more than once 70+ points (if I remember correctly my record is 79, but you can easily check my last games and the last month I scored a 76) and sometimes I red more higher scores. In this old thread
http://forum.boardgamearena.com/viewtop ... f=3&t=2277
also if Unofficial, there are some other higher scores, and a player scored 93 points that as for what I know, probably are the better score ever on the site.