If there is one thing about achievements I greatly dislike, it's multiplayer achievements. I will promise you right now if one of the achievements in Halo 3 is to get 10,000 kills on XBL or something to that extent, spawn camping is going to be a million times worse. Nothing will encourage modding or cheating more than having you get an achievement for reaching a certain level or rank for multiplayer. I mean, people in Halo 2 did what they did purely for the sake of having a higher level, and now if they have achievements too as a reason to do all this shit... I just hope Bungie knows what they are doing and doesn't do what the 14 year olds across America want them to do. Unfortunately the 14 year olds might be their biggest fanbase.

But I do agree with all you said there. The gamerscore means absolutely nothing cause hell it's more about how many games you play than how good you are. Also you'll have an achievement in a basketball game that is like score 50 points with one player and it'll give you 250 gamerpoints (not hard to do at all) where as you'll have an achievement in Rainbow Six Vegas that wants you to become an Elite (Without cheating, it'll take you over 3 months of playing almost every day for many hours a day) and that achievement is only like 40 points. The only time anyone looks at a gamerscore as if it means anything is if you see someone with a really low score you assume they just got a 360 and if you see someone with a really high score (I have a friend with a gamerscore in the 26,000 range) you know they don't get outside.