Re: "researchers to be given access to Facebook data. Like Dr Kogan?"
There's the same problem with credit agencies like the Equifax hack. A large target that was breeched and now we're all in peril. It'll depend on the degree of watchfulness we have to have over our finances, etc. and the cleverness of the miscreants who use it. Laws are fine, implementation is tough. I hope the GDPR helps close some backdoors, etc. to the miscreants and if sites holding less data means less hacks and attacks, then that will be good.