Some junipers make resin drops, but these resin drops are rarely round. Berries aren't possible right now; they should be either green (last year), blue/purple (last year and two years ago) or still in a flowering phase which has just started for chinensis varieties.
So yeah, facebook people are misdirecting you.
An insecticide for another type of pest wouldn't kill your tree but it would also do no harm to the scale. It's a stress on the environment and a waste of money to use something that doesn't work.