I can't use the name as it will out me, but at a toddler group I used to go to there was a terror of a girl. She was 2 years old, cute with lovely blonde hair, but would scream, push, pull, attack the other kids. She had an 'interesting' name, can't say the exact one, but it was along the lines of 'modesty' 'comfort'.
One day her mum (who was barking mad) put her on a time out after she'd walloped another few kids. Except the mum had put her on time out outside the door to the hall and said she'd check on her in 2 minutes.
The leader of the group took exception to this, told barking mum that this wasn't allowed, as they were worried the child would run off as the main door wasn't locked and was near a road.
Barking mum became roaring mum, shouting all over the place about how it was unfair, she wasn't ever coming back etc. Grabbed her DD and left. That was a a year ago, and true to her word she's never been back!
Also, at the same toddler group. I was due DC2 and about 2 weeks before due date I bumped into one of the helpers in Tesco's. Was chatting to her, just small talk and I said something about coming back to the group with both kids once DC2 was a about a month old. Mentioned that I'd be breastfeeding the newborn, and the leader shook her head, said she'd been helping there for 7 years and had never seen a mum breastfeed... then she said she'd need to "ask the organiser, make sure that's ok." I was 
Suffice to say, I rocked up with my newborn and breastfed and no one said anything negative. I would have been ready for them!