I agree in principal with what you are saying...but there needs to be some distinction between fixed-gear bikes and track bikes. Since "fixie" is such a widely used term, I think it best not to ban it as it does a good job of describing a bike that has a fixed gear but is ridden by hipsters and messengers. Something you would never be allowed on a velodrome with. Also, would you ride a serious track bike on the street? Why? A beater fixie is the safest and most cost effective option.

That's my $0.02.