That's a wee bit unfair - Just because somebody doesn't know what to make of...
...doesn't mean they won't know what this does:
And the minified code - though possibly even the input - makes use of quite a few such tricks and programmer shorthands.
refactored+annotated (making no claim that it still works, or even that I got it right - I certainly wouldn't use it): http://pastebin.com/CTXaCnkp

But for most people with concerns, this is the only bit of code that does anything they should care about:
All it does is make the entire signature fully transparent and unresponsive to clicks/taps, and that bit of code is only called if the signature scores badly.  There's certainly no communication with a mothership or secret background bitcoin mining on your CPU etc. going on. (as of this post)