The first feature on this evenings The One Show showed how Facebook are letting people down:
https://www.bbc.co.uk/programmes/m001vwsp
After having their accounts taken over by scammers, they then proceeded to scam the friends & family of individuals in their name.
This was reported to Facebook who decided that no action needed to be taken because they hadn't broken any rules!!
Ofcom has found that a lot of problems are being caused by websites not enforcing their own rules, which they intend to deal with.