Fortify the Churches?

A church by its very purpose should be welcoming, but in our increasingly strange and violent times, perhaps we need to install barricades and tighten security measures, as apparently the unbalanced and evil now find about anyplace people gather a tempting target for murder. The nature of a congregation is to welcome, but sadly today, it must be to screen first. I suppose everywhere a crowd is likely to gather must enhance security measures in this troubled era.