But the paedo-protection and no blood policies definitely should be banned.
For the first one, the issue is legislation and violation of existing laws. People can already be held accountable if they put children in danger.
For the latter, it's still a religious belief. They shouldn't be allowed to put any spin on it (e.g. suggesting health benefits) as then they are really practicing medicine but it's like vaccinations - people are allowed to make idiotic beliefs based on some idiots teachings.
Whether you can come up with realistic legislation for things is difficult. Usually the courts get involved when it's minor children but when it's grown people ... we all make decisions that affect our lives based on our current belief system. How exactly do you legislate against that and where does it end ... making people exercise more, drink less etc... ?
Why would governments get involved in certain things and what would be the benefit for them, the politicians, to do so?
None of them is going to piss off millions simply to slightly improve the lives of a few thousand.