That's a hard one and it's tricky. I know we're in love with the idea of religious freedom and the history books taught us lessons of people fleeing for their lives etc. because of their religion. So, the idea of banning a religion seems abhorrent to some people.
But, religion has gotten very complicated. Freedom of religion shouldn't be a license to do anything you want.
I believe the JW religion is not harmless but damaging and at the very least there should be laws to check their hand when it comes to the blood transfusion issue and minors in addition to protection against pedophiles... Also what about when one of its adherents causes an employer to be sued for breach of confidentiality:...for example when a Witness works in a hospital and finds out a patient who is a JW had an abortion, an STD or blood transfusion; the Witness goes and blabs....Far too many Witnesses will leave a disaster in their wake and have no sense of professional behavior or confidentiality. This is also a consequence of their being uneducated. Educated people at least have a sense of how the world works.
I also feel that they (in addition to other religions) should show they help the community and I'm not referring to free bible studies. They should do what Christendom does or lose tax status.