This month's editorial in Aviation Safety and written by Jeb Burnside is titled "They're Heeeere..." It describes three events with UAV's from the last year in the NASA aviation safety reporting system(ASRS). On near miss, and two descents without clearance. The descents without clearance included one where the operator lost control of the UAV and it went on its Emergency Mission profile, and the other was implied to have occured because the operator could not keep the UAV at FL350 and so descended it to FL300 without clearance. There were 24 reports from the last 5 years evidently. His conclusion is "More UAVs in private and commercial hands, which cannot be expected to operate them under the same degree of control, means more events."