Damien

They had a sound/edge type system that confirmed he touched the ball.

It sucks, but offside is offside. If you start giving them discretion to allow it because it was a minor touch, then you're adding a layer of subjectivity to one of the few rules that is clear-cut. Then, when a similar goal is ruled in or out because that ref that day gave it the other way, then people will be even angrier.