Bit of an evergreen that one innit?
Anything bought from an unnofficial source that plugs into the mains is a risk, common sense would dictate that.
Hang on, did I mention the British Public and common sense in the same breath?
Oops
Mind you, some sources don't need to be unofficial to blow up in your face, Hmm, yes, that's you Mr Sony, stop hiding behind that laptop....