As a worship team member, I have a good view of doorways, but being on camera limits carrying. So, my backpack is close at hand.
Camera operators can view many angles, and members patrol the grounds continuously. One church's worship leader was an ex-SWAT officer who created a low-key security team of members and also counseled other churches. Another church has security with CCL's wearing FBI-style earpieces.
But when our former church hired a new Pastor, I tested him with talk about a recent good-guy-with-gun event. His immediate response was "So, you would shoot a 16 year old?"
In other words, he's OK with passively sacrificing the lives of members who may not want to die a painful death. Good to know.