The eating achievement is actually pretty simple to get. At least you still have to work for it.

To me stupid achievements are those which... you get 1000GS just for playing through the game normally ala King Kong, FNR3.

Other stupid achievements are the impossible "Get To The Top Of World Leader Board" stuff... come on lar.. yes that is an achievement but people can see on the leaderboard when you actually do that right? And it's not like they give a shit load of GS when you actually GET to number 1!

So far.. the achievement which I derive most satisfaction from unlocking is... "Survive 1 Million" for Geometry Wars!