[exDM69]

Some background from a Finnish news article [0]: these guys are experienced, professional RC and drone camera operators and the copter is a professional quality photography drone. They describe the copter as a "5 horsepower circular saw" which is "pretty dangerous even without a chainsaw attached". Indeed, you have to operate such machinery with caution and respect. All in all, it looks like they were operating with caution and in an isolated area without causing any risk to outsiders.

Silly and pointless? Yes. Reckless and stupid? Perhaps not. Fun to watch? Hell yes.

[0] http://nyt.fi/a1459480177666