Banning beef will not stop the use of beef, beef is yummy and I don't care if its banned in Bombay, i'll still find it. It's quite silly to ban beef because of religious sentiments, pork should be banned too in such a case. I say, let it all be available and those who want to consume it can & should be able too.
This whole thing is just as useless as banning prostitution, it happens regardless, best to make peace with it and legalize and then at least you can have strict guidelines on how it is practiced.