I saw some pretty terrible bullying at my secondary school and thinking back now I wish I had the balls at the time to say something.
Same here, and sometimes I was the victim.
One of the people that I used to most look up to was one of the popular kids from the secondary school that I went to. He was different from most popular kids in that he had time for everyone, whether you were popular too, or a complete loner. He simply didn't care if it was uncool to hang around with the unpopular kids, he just did it.
This kid had an
extreme intolerance to bullying, and would literally beat people down if they didn't stop saying what they were saying when he asked them to. I didn't particularly agree with the violence, but there wasn't really any other way for him to make enough impact to make the bullies think twice, plus, it was quite amusing to see a loudmouth get clothes-lined off the bin he was sitting on for shouting abuse at people.
As with most things regarding children, parents need to do a better job of making sure that their children understand that bullying and intolerance is unacceptable, and to not fear stepping in if/when it does happen. If every school had just one kid like the one from my secondary school, who had simply been told that he had the power and influence to stop the bullying almost completely, school life would be a lot more bearable for so many children.
On the topic of redheads being bullied, I've not seen much personally. A bit of joking around, some tit for tat, but that's where it has ended. Now that I'm an adult, if I did see someone being bullied, I would step in. Intolerance makes me mad!