Total abstinence is the only safety; for if you allow them to imbibe at all, they will after a while get in the habit of drinking too much of it, and the first thing you know they will be going around drunk on sacred psalmody.
Beside that, if you let them sing one tune at a service, they will be putting their oar into the other tunes and bothering the choir.

There is nothing more annoying to the choir than, at some moment when they have drawn out a note to exquisite fineness, thin as a split hair, to have some blundering elder to come in with a "Praise ye the Lord!" Total abstinence, I say! Let all the churches take the pledge even against the milder musical beverages; for they who tamper with champagne cider soon get to Hock and old Burgundy.
Now, if all the tunes are new, there will be no temptation to the people.
They will not keep humming along, hoping they will find some bars down where they can break into the clover pasture.

They will take the tune as an inextricable conundrum, and give it up.

Besides that, Pisgah, Ortonville and Brattle Street are old fashioned.

They did very well in their day.