D&C 76

 The Lord instructs the early Church - 

"Nevertheless ye are commanded never to cast any one out from your public meetings, which are held before the world.

4 Ye are also commanded not to cast any one who belongeth to the church out of your sacrament meetings; nevertheless, if any have trespassed, let him not partake until he makes reconciliation.

5 And again I say unto you, ye shall not cast any out of your sacrament meetings who are earnestly seeking the kingdom—I speak this concerning those who are not of the church.

6 And again I say unto you, concerning your confirmation meetings, that if there be any that are not of the church, that are earnestly seeking after the kingdom, ye shall not cast them out."  (Doctrine and Covenants 46:3–6)

I believe the inclusion of "earnestly seeking the kingdom" would suggest that this would not include situations of unruliness or safety.