If every drone was required to be equipped with a transponder and every user required to be in contact with local ATC using a hand held transceiver, how exactly would commercial traffic ever get a word in. The airwaves would be filled with chatter and the radar screens filled with hundreds if not thousands of returns all generating potential conflict reports, because there are no rules of separation between drones. I can't imagine a worse scenario in terms of reducing commercial air safety.
The genie has been released from the bottle and although the popularity of drones may wane, they are here to stay. Mandatory education, registration and licensing of operators at the point of sale is probably the only reasonable course of action, but for the immediate future the problems will remain.