And perhaps a good way to look at it is this.
Name one other place where you hold hands with strangers.
We kneel and pray in many places
We sing aloud in many more.
But we don’t hold hands with strangers and shouldn’t in Holy Mass.
I sometimes stay kneeling just to make it so no one will try to hold my hand. I do this because it is easier than saying no to a hand holder. At Sunday mass no one kneels except for a few rebels once in a while (including me). So you have to say no on join the group. I pland to bring some of these issues up the next time I go to confession. This lack of reverency for the liturgy makes mass uneasy, and for the wrong reasons. These issues are the last things that I should have in my thoughts during mass. Many of the problems I see are practices that were part of the non-Catholic church I use to attend before I converted, including the “toss!”
Protestant Church, A.A. meetings, 18th century dance re-enanctment dancing. It's not common, but it happens.