Just found 'the classics' and need to add my bit!
15 years ago, a Y2 child was seemingly 'behind the times' in class - answering questions asked 15 minutes previous and had been sucessfully answered etc, not making eye contact etc. I brought up my concerns with parents who then challenged me in the playground a few days later and said my accent confused her. I replied immediately that I had 29 other children in the class who didn't have an issue.
A year later a parent came in screaming and shouting and threatening to remove her child because her child had been reprimanded for telling a very big lie which resulted in the dismissal of a dinner lady (child said dinner lady had sworn; she had not). Parent said her child doesn't lie. (The entire class and the child retracted their statement!)
13 years ago I was teaching Y4 (brand new school, we had our ups and downs - mainly our downs) and a mum came in and complained that her 9 year old daughter should not be using scissors (they were the coloured handled child scissors that aren't sharp enough to cut through skin!!!)
Another parent (dad) had a go at me because I said it was not appropriate for his 9, nearly 10 year old son to throw a paddy because his rounders team didn't win by throwing the baton across the field, sulking on the grass and refusing to come into school. He said "Who said it isn't appropiate?" I said "Society!" Boys mum wanted to curl up and die - she was a TA at the school!!!!
Only 4 years ago I had a little girl bring something for show and tell. (Y1) I immediately played down the shocked expression on mine and TAs faces as I took the item to the office and explained that mummy would have to collect it after school. It was a vibrator! She never did collect it. Same parent only a year before wanted a YR boy removing and police called because her daughter and the little boy were found in the same cubicle having a wee. She claimed her daughter had been 'violated' by a 4 year old. It was truly innocent (boys and girls share toilets in YR) and she had gone in before the little boy had removed himself. It had come about because the little girl had went homeand said she had seen xxxxx tiddler in the toilets!!!
Another mum berated me and wanted to make an official complaint because her daughter wasn't a 4C in Y4. Apparently I had said she was a 4C and that it was on her report from Y3. I told them to go ahead with the complaint after 30 minutes of arguing as I knew their DD wasn't a 4C and that they were mistaken becauase at the time grades in years 1, 3, 4 and 5 weren't reported. She had mistaken DD's report with that of DD in Y6 in the previous year.
Another girl's mum complained to the head because I wouldn't share the results or compare her daughter's friends optional SAT test results with her daughter's (friend was girl of loony 4c parents).