Abbie,
I had to be extra cautious as a professoional photographer , also it was common courtesy to ask but it was easier to avoid the problem , also extra caution has to be made when photographing minors . I still feel it's a grey area with the law on human rights , I do feel the modern use of cameras on mobile phones borders on rudeness and lack of consideration .
Tracy ,
Thed fact that it didn't bother you doesn't mean we should ignore the rights of others .