Most teaching of kids in general, and the teaching of the violin specifically, is a form of abuse. But that's another story for on this occasion I'm on the side of teachers. The Musicians' Union, along with a cabal of other disreputable organisations like the NSPCC, have created this insanely creepy patronising video to advise music tutors to avoid all physical contact with their charges.
Let's not forget it was this same shower who successfully voted to have synthesisers and drum machines banned in the early 80s. As you can imagine, I had a few run-ins with them myself - the first upon being forced to pay a tribute to their muso crime family when Essential Logic did a John Peel (topical irony unintentional) session on BBC Radio. You had no choice. And because of the electronic music issue, it was also another reason a degree of subterfuge was necessary when Whitehouse did shows at traditional London venues the ever-officious MU kept tabs on. By playing our EDP Wasps, we were depriving 'real' fiddlers and trombonists and other card-carriers of their god-given livelihood. Apparently.
That said, if you go peruse the MU's most recent campaigns and issues, you realise that so much more of this is about finding increasingly elaborate ways to raise revenue to support, and thus validate, this thieves' guild's very existence.
If there's one good thing that kids are going to get out of music classes, it probably isn't music; it's physical and metaphysical connections with other kids, the instructors, their audiences. More than being healthy, it's what makes it fun. Of course, coming from a society already damaged enough by paranoid Edwardian hang-ups toward all forms of physical contact and display (even to oneself), this neurotic no-touch obsession is but a logical extension.