Hey Tanya,
I think just before the start of highschool is perfect. Taunts at primary school would be minimal but once you hit highschool, it gets pretty heavy.
I remember my neighbour and her friend (both a year ahead of me at school) telling me I couldn't POSSIBLY go to highschool with hairy legs, and blablabla... I got hassled heaps.
I cried and cried and complained, and it still took me til the last half of the year to con my mum into letting me do it, and even then she wouldn't let me use razors... She had this awful painful thing called an "emjoi" (was heavily marketed on tv at the time) which looks like an electric razor but instead of the blade it has loads of mini tweezers... it was AWFUL! It was supposed to have a similar effect to waxing in the way of regrowth, so I was hardly ever allowed to actually use it, because mum only had to use it every 2-3 months, and she assumed I should be the same - she is BLONDE and I am dark - I had to use it pretty much once a week and do it in secret, I hated it.
So anyway I ended up just buying regular razors out of my pocket money the year after because it was so painful and frustrating, and keeping them in my drawer so she wouldn't know, and I guess she just thought I had 'magically' turned blonde and didn't need to use her crappy pain machine. I also had to buy brand name pads/tampons out of my pocket money because she would only buy me those massive home brand nanna pads...!
OH GOSH sorry for the ramble - just giving you ultimate confidence in your decision! LOL.