Fools or knaves....
The people lying about BECTA, that is.
At best, they have about as much wit as the numpties who slagged off Birmingham Council for cancelling Christmas; they've heard something somewhere, and haven't actually got around to checking it - most likely because it fits in with their preconceptions. I suspect that a lot of the time people in schools have been told "BECTA say this" or "BECTA say that" when it's just the LEA or the school admin types making life easier for themselves.
For a more specific example, if any of them had bothered reading this page: http://about.becta.org.uk/display.cfm?resID=35287 they would have seen that BECTA not only didn't recommend wholesale adoption of Microsoft software, but also recommend Open Software and complained to the OFT about Microsoft's practices....
Sadly, this also makes it a lot more understandable that our current Government should scrap them.