We were amazed to see some people we know put their BTC flat on the market and move to SW17 the week after the eldest kid got into Belleville
I also know people who've done this. If you drive around the Toast Rack in the "summer fair" season there are all those houses with "support the XXX school summer fair" "for sale " boards outside the houses and I can't help but wonder "you've got a 3 million quid house and you've nicked a state school place" .
I also feel it's hard to blame people. We all do the very best for our children (tutoring, outbidding people on houses in good school catchment areas etc etc) so although I find this a particularly vulgar method I can't bring myself to blame them. If I could afford to bid more for a house in a great catchment area I would do and so let my wallet bully someone else out of a place which is also vulgar I guess.
If we had enough great schools it wouldn't be a problem!