If you can’t guarantee the safety and security of a church’s tabernacle, it’s not a proper tabernacle to be reserving the Blessed Sacrament. That’s canon law.
So if you have a lot of violent desecration or theft or fires going on, you have very few choices under Church law. You have to get a really heavy-duty tabernacle that’s built like a safe, you have to build it into a wall or support pillar, or you have to stop using such an insecure place.
That’s also why all parishes with Perpetual Adoration have to have a plan for security that works. Some areas need to worry less, some need to think about it more, but nobody can ignore this stuff.