Re: This is bogus
I think I would believe Google over you. Why would THEY claim something can hang an Android phone if it actually can't? If it was some random security researcher then maybe your skepticism would be warranted, but it is easy to imagine that if the tables are crafted correctly it could put the assisted GPS function into a loop or something that the OS doesn't recover from since it is assuming the tables are properly formatted.
Use of other standards is nothing new, I think Apple has used Qualcomm chipsets that supported GLONASS since the 4 or 4S, and I'm sure Android from a similar time frame at least in leading edge devices using the same chipsets. That can make it a bit faster to get a proper GPS fix in a place where your view of the sky is obscured (i.e. tall buildings) but doesn't do squat for you if you don't have a view of the sky at all, like when you inside a building with too much between you and the roof. Maybe the assisted GPS needs to take alternate sources into account as well.
There's also whatever the Euro solution will use, so someday we'll have four independent methods of determining a position fix, so the algorithms could be improved to throw out one that looks bogus (i.e. if the US blocked GPS in a certain area, the EU might join them but Russia and China are unlikely to do so as well)