Jobbo is probably be more deserving than some who hold blue badges...
I never park in disabled spaces out of principal (i.e. the principal of obediance to the system
) but I definitely know what Jobbo means in relation to some merely being there to satisfy planning regulations. IKEA seems to be a particularly bad example, I expect simply because of the size of their car parks - they have perhaps 20 parent and child spaces which are always, without fail, full and then maybe 40 disabled bays with no more than a handful occupied.
It is difficult to make a moral case for not using them if the probability of inconveniencing a disabled person is nil. The counter of that is obviously if everyone took that view it would be down to the individual to assess the risk of actually inconveniencing someone - what percentage or number of available spaces makes it too much of a risk? Let's just say that system of treating people as intelligent functioning adults is unlikely to work
Anyway, if I need to get my car park kicks I just take my 2 year old son to Sainsbury's in the back of the 911, park in a parent and child space and then easily fit a weekly shop in the front boot and drive away in smug satisfaction that I'm DIR and the bloke next door in his new diesel Q5 with a half empty boot and one child seat is massively DIW.