lol, no matter what the weight limit is people will do that.
one problem i have noticed though. batteries don't all weigh the same. i'm kinda ashamed to say this, but 810 is guilty of doing this :/. at NYC, our robot was just 130 lbs, only because we found the lightest battery of our five. there were huge differences in the battery weights. so, yeah, you might be able to 'shave off' .4, .6 lbs, but it's something FIRST should look into. maybe having an offical weight of say, 120 lbs, w/o a battery. i think this would eliminate the problem, although the thought of it only being 120 lbs will screw with some people's minds

.