FWIW, I also agree with Alan_Brown -- I think the burglar scenario is a red herring. There is no real security in obscurity, only the illusion of such. Besides, to mix my metaphors even further, that horse has already left the barn. A Wasatch Front burglar casing a given street or house can already punch in the address to the new Meetinghouse Locator app, and learn directly about meeting schedules.
I suggest that people just lock their doors when they go to church..
Seems like a silly concern, when simply driving a neighborhood (casing, as buglers do) would tell you more information than the boundaries and meeting times. I can tell you who is going to church / who is not just by standing on my porch on Sunday morning, regardless of religious affiliation.
We seem to have more trouble here with people going through the parking lot during meetings than breaking into houses. It isn't that hard to figure out when the meetings are going on from the cars parked out back.
As you move out of heavily LDS areas, the concern becomes even less, as it gets harder to correlate membership and address.
I agree that 'security concerns' is a non-issue for me.