Yes, Blu, we had that hideous experience with primary school (the Council refused to acknowledge that is was a problem with people holding onto multiple places simultaneously but then miraculously changed their system the next year so that all applications, faith school or otherwise, had to be detailed on the same form) and struggling to get DS a place - we didn't get offered a place at our 1st choice school till mid August. Wouldn't want to have to go through that again....
Yes, think that the Councils should insist that they are made aware of all applications being made, even to private schools, on the CAF form, so that they could elicit some response as to whether the state school place accepted is still required....
I think a very tiny minority of parents have a selfish approach to this horrid secondary school lottery (as long as their children are okay they don't care about anyone else) and many people fail to consider the wider implications - i.e. being selfish for one's own child's future impacts on many, many other DCs' choices and stresses lots of parents!
I can fully see, having looked at the trends for what's going on on the thread on Trinity/Whitgift that is running at the moment, that there are going to be a significant number of parents within the M25 considering both state and private secondary school provision. As there's not much of a time difference twixt offers' days, it is highly likely that some will accept (and I am not blaming anyone just pointing out that it is likely to happen), a grammar school or other state school place (if offered) whilst mulling over (and possibly more likely to prefer) the private school options/possibility of bursaries/scholarships etc.... so the whole thing will go pear-shaped really from Offers Day.... HMMM!
To some extent the London and surrounding area Boroughs probably should be more proactive in actually determining whether people have also applied for private school places - then they could actually just send out an email - every fortnight or so - from 1st March just to remind parents to let them know if they go down the private school route and to relinquish the state school option. It is all extra work for them but in the end it might actually ease months of confusion and reduce the number of time-consuming, costly and stressful appeals!