Micro:
I understand your point.
UAV's like that one, and similar hobbyist style RC planes that I've seen pics of soldiers using for local recon, aren't a big deal. They're typically for recon of the immediate area around a patrol unit and are intended for ranges of a few miles. They're not armed and they're not very autonomous.
Ain't got a bone with it.
The above "Taranis" UAV, however, does the following:
-Long range recon
-Long range strikes
-Makes its own engagement decisions
-Applies stealth technology
-First of a generation actually intended to engage other aircraft
The above UAV could be used to knock civilian air traffic out of the sky with no trace of the attacker, ditching the craft into a no-man's land when done with it. Or to assassinate inside the US, with no trace.