NFHS Question

[bucky]

I've had this play and always wondered about adjudication by strict rule:

A1 in BC dribbles near his coach, who is standing extremely close to the sideline. The coach gives verbal instructions and in doing so, places his hand on A1's shoulder. There was no defensive pressure at all.

A1 did not touch the coach intentionally/inadvertently but rather the coach touched him. No advantage for anyone was gained by the touch. I allowed play to simply continue but some nearby were giving me weird looks as if to say "Is that allowed?"