I can see the temptation but it's a step down a slippery slope, but I think out of all the traditional Islamic garb, the Burqa is the most problematic one because of its all covering appearance. In short it's a bit of a security risk, much in the same way that you can't wear a motorcycle helmet into a petrol station kiosk or shopping store.
Something like a Hijab or Khimar is a much better alternative, and if you are going to ban the Burqa then women should be encouraged to use them as an alternative if at all possible. However, it's a problematic situation as it stands on civil liberties, is this another situation where a society is giving up liberty for security?
