In our town, as soon as they introduced parking fees for disabled badge holders, everyone started leaving the allocated bays empty and parking on the double yellows on the streets. In many cases they cause obstructions, such as parking too close to junctions or opposite bollards making it difficult to pass or (my real bug-bear) on the yellow lines at the very end of the white zigzags approaching a zebra crossing - makes the crossing extremely difficult to see on approach and actually forces drivers to be in an overtaking position as they reach the crossing.
Grrrrrr! Gives people with blue badges a bad name which most do not deserve. (And our parking fees aren't even that high, 70p an hour in most car parks!)
Rant over, have a good weekend!!