Let me just start by saying that this is nothing against teachers.
When my ds was at preschool there was another little girl who also went there whose mum had been a teacher before she had children. A whole group of us became friends and she became a part of our social circle, and also had lots of other friends among her other older child's parents.
When her dd started school she took a job as a TA at the school. However, a couple of years later, a teaching post became available at the school, she applied and was successful.
Now, because so many of the parents knew her personally before they knew she was a teacher, they know an awful lot about her private life that they wouldn't know about the other teachers iyswim, and she is the subject of much gossip in the playground. She is also hugely unpopular, as people know things about her private life, i.e. that she has had affairs for instance and this has clouded their judgement of her teaching methods.
I realize that obviously she can work where she wants, and that working in her children's school is probably the most convenient for her. But I can't help thinking that schools should perhaps think twice before recruiting someone who is seen as a parent first, and a teacher worthy of respect and with an influence over their children's education second.
It can't be nice for her knowing (and she must surely know, as everyone knows, iyswim), that she is essentially the gossip of the playground.