Are Drones becoming more dangerous to Airplanes??

Yes!
In a five-month period ending January 31 this year, the U.S. Federal Aviation Administration reported that there were 583 near misses between drones and planes, more than triple the number in 2014. The U.S. Center for the Study of the Drone at Bard College tempers the FAA report saying there is some duplication but it agrees a number of 519, of which 188 or 36.2% were close encounters.