Maybe as ADS-B gets less expensive, that'd be the way to go. However, at present, ADS-B pricing is utterly ludicrous for hobby. As it is, the ATCRBS is antiquated and cumbersome for drone use.
I know of one state that specifically regulates R/C, rockets, and kites within the vicinity of an airport. I don't see why the FAA couldn't address the issue and make a uniform rule across the country.
On a tangent: I have hit birds, had more RAs than I care to count (thank my lucky stars for TCAS), and just a few months ago, as I was coming down final for 34L at VNY, I had to maneuver to avoid a kite being flown within the final approach corridor. Every one of those involved me reporting it to ATC and filling out any requisite paperwork and/or being interviewed by ATC personnel after-the-fact.
And a final story, somewhere over Georgia a couple years ago, talking to Atlanta Center, there was a Lufthansa flight descending through the clouds that queried Center about a weather balloon flying at altitude. Center was not aware of the presence of the balloon and the Lufthansa pilot, expressing his concern (in a heavy German accent) says, "That was FUCKING CLOSE!" The particularly bad thing about a balloon is that one cannot see if a cable extends beneath it or not until it's too late. If it's not charted or not NOTAM'd, it's extremely dangerous.
People do stupid things. Unfortunately, we are in a world where stupidity has to be regulated.