Every piece of technology is regulated (in organized communities), for keeping people and environment protected.
I don't believe that there will be more regulations, or restrictions, because someone flew near a helicopter. Airspace is already regulated.
On the other hand, it's not easy for a drone to collide with a manned aircraft. Of course, an accident is possible, even if possibilities are low. That's why all these incidents are "near".
For now, drones are a little"mysterious" machines, with unknown capabilities for the ignorant masses. This is the reason for media and people over-reacting, every time a drone is involved in some case.
The solution for minimizing risks, is EDUCATION. We must be educated to proper use of technology (not drones only), and we must educate people to accept technology without fear.
It's very easy to avoid a possible collision with a helicopter. We have to lower flight altitude, immediately, as soon as we hear a helicopter flying in the area.
To avoid crashes and accidents, we must become good "pilots", so training (in safe environment) is essential.