As a pastor in training (seminary dweeb and pastoral intern) my personal feelings on this are mixed. I personally would prefer that there not be a need for any weapons in the church, but we live in a fallen world where bad stuff happens, even/especially at church. Various church shootings have proven that. Many states have laws explicitly outlawing carry in "houses of worship". I'm no constitutional scholar but this seems like a pretty obvious breech of the establishment clause. The state is pretty much saying that churches cannot decide for themselves whether they want to allow ccw (or even open carry) in their facilities.
If I lived in a state that did not have laws violating the establishment clause concerning ccw- I would have it written into the church bylaws that ccw is permitted on church property, at any church function, by any member in good standing of the church (not under church discipline), or as permitted by the session (sorry, I'm a Presbyterian. elder board, deacons (Baptists), board of trustees, etc.) for non-members on a case-by-case basis. My rationale for this proposed policy is this- I carry in my own home, but I reserve the right to decide who I allow into my home with a firearm. Likewise, this is our church that God has brought us together into as a local body (like a family), we carry in our facility if we are so inclined, but we reserve the right to decide who, other than members of our body, can carry here.
Do I plan to police this in any way through metal detectors, searches, or a sign at the door? No. But that's the policy nonetheless, and it is in the church bylaws for anybody who wants to read them.
As for what your fellow member heard at a conference, I don't really care. It doesn't make any sense whatsoever, and sounds almost exactly like the same kind of drivel as "you are more likely to have your own gun used against you than be able to defend yourself with it" that the Brady campaign constantly mutters to anyone who'll listen. What good is a security team that is unarmed? Are they just supposed to be volunteering to be the first martyrs? If somebody has disabled the guy at the door to the point that they now have his gun, they probably already had a gun to begin with.