[Fred Mertz]

But, if I wait until the recessional song is complete, should I stop the others (in my pew) from departing?

I suppose I could throw an elbow or two....

[Coleus]

I don't move, but then again, I'm 6'2" would be hard to move me, LOL

If I were you, I would put my kneeler down on the floor and stay put and inform them that it's disrespectful to God to leave in the middle of a prayer. Sooner or later they will get the hint and stay in their pew until the end or they will sit in another pew.

You may want to have your pastor to put a request in the Church bulletin to remind them of their indiscretion .