After all these unattended babies in cars today I thought I'd share my story from late last week. There's no AIBU - sorry but as this is where the others are all posted it seemed appropriate.
I was on my way to the supermarket and my 1 year old fell asleep in the car. I'd had an exhausting week and I was getting towards the end of my tether and the sleeping baby was like mana from heaven. I settled down to browse mumsnet on my phone and listen to David Bowie's greatest hits (I must confess I left the engine running so the AC stayed on - it really was very hot outside) and I just enjoyed 10 minutes peace.
Next thing I know there's a security guard peering in through the window - someone had reported DS as an unattended baby in the car and was waving her arms about in an excited way. In fact when I came out of my MN-induced stance I realised a little crowd had gathered to watch the drama of the unattended baby unfold.
I opened the door and thanked them for their concern but explained I was just enjoying the quiet that an unexpected nap brings. I'm glad that there are people looking out for DS but you'd really think she'd have checked the baby actually was unattended before calling security. 
I hope this amuses some of you at least!