I read a story a while back about a guy going nuts at paramedics to move their ambulance when they were attending one of his neighbours... they (obviously) didn't move so he tried to squeeze his car past them half through his garden and along the pavement, hit a lamp post and wrecked his car... 5 minutes later the ambulance was gone and the angry fellow was still stuck at his house with a smashed up bumper + bonnet. Karma, I guess.
But yeah apparently this is becoming really common. Worse still; my... err... cousin-in-law(?) is a 999 operator and has
had calls from people ranting about ambulances or fire engines blocking their drive, saying "get them to move it or I want the police", etc.
...so not only harrassing emergency services crew, but also wasting the time of 999 operators
.