Actually, at least in the US and UK, "ecstasy" usually refers to pills of MDMA which have been cut with some amount (50% or so) of meth or a similar upper. Pure MDMA (much safer) is more commonly referred to as molly to avoid confusion. The two formulations are very different.
Not to say the BBC's audience is a bunch of ecstasy addicts, but they aren't all chemistry PhD's either. Most people know drugs by their street name.