Gesture in entertainment, particularly singing, has a long tradition behind it. 19th century comics and clowns like Grimaldi and Cowell made a living out of it. Most of the actual songs they sang were pretty dull things, but they made them into highly popular entertainment, by their antics and gestures, grimaces etc.

However coercing the audience into doing actions is somewhat naff, and should be confined to young children. it reminds me too much of all the theatrics in some church congregations.