To think this is indefensible?

[deliakate]

See a clapped out, old-ish car hurtling down the M25, in the fast lane, swerving and weaving in and out of cars, trying to be the fastest. Very bad driving. So I look a bit closer to see what kind of nutters they are - it was a couple, with a young toddler standing, loose and unrestrained, in the passenger footwell, in front of the woman. I was flabbergasted, and genuinely felt sick. Even AIBU can't excuse this, can they?

Madness

No they can't. Did you take the number and report it?

No.

Did you take the registration? I'd've been on the phone to the police straight away.

I hate seeing unrestrained children in cars.

I assume you phoned your local police station to report the bad driving/unrestrained toddler

I didn't. Really wish I had, I would do so again.

It might be worth calling (not 999, but the met maybe?), with a description of where, when and what the car looked like - motorways are covered in cameras, they may have footage?

Definitely report if you can - as branston said even with a relatively vague description they may be able to do something.

A year or so ago I was coming out of mothercare when I saw a man, woman, toddler and newborn getting into a car. Toddler went in a car seat, pram went next to him. I then watched as man got in behind wheel, woman got in passenger seat holding baby, and off they drove. I followed whilst making now-ex phone police and report them.

We had to phone 999 on the M6 once. It was dark and a flatbed truck passed us in the middle lane. None of the lights were on the truck and there wasn't even any reflective stripes. From behind you couldn't see him as I realised when he had to slow for a junction and we were then behind him. I called the police and was impressed to see the truck stopped at the M6 toll road booth and a police car in front of the truck.
I know it is not quite the same thing - ie unrestrained children put the police acted on the info and prevented what could have been a nasty accident.

i reported an eratically driven car on the motorway once.

The next thing I knew I was in court as a witness for a drug driving prosecution.

The police do act on stuff like this.

Pretty indefensible to have seen such a thing and done nothing about it.

I was actually driving myself and have a shocking memory. I'd probably have got home and reported a lovely old couple, or a single man or something....

hard to really do something if you can't remember the reg and can't use your mobile as you are driving on the motorway.