I have always been against the use of technology in football though conceded on goal line technology as long as it was instant (which it is).
You cant get rid of the human element in refereeing. As a striker will put the ball wide from 6 yards out, a referee will also get decisions wrong. It is part and parcel of football and there arent enough natural stoppages for technology to play an active part in football. I believe on the whole referees do good jobs up against increasing pressure. A manager will always come out and lambaste a referee for a wrong decision but wont his striker who misses a sitter.
There should be increasing dialogue between managers and referees but also greater protection of referees.