DD (9) wants a buzzcut; anything we should bear in mind?

[WomanIsTaken]

Just that really. DD, who is 9 and in Year 5, has decided that she really wants a super short buzz cut. She's quite adventurous has a healthy sense of creative independence when it comes to her appearance, but I wonder whether there is something I am missing that I should be asking her to reflect on before taking such a drastic step. Is it very cold? Has anybody had a call from their child's school following a similarly adventurous cut?
She currently sports a nice thick bob with a short back and long, sharp assymetric front. She isn't into make-up or hair dyes, just likes strong looks, I think.
Should I urge caution or give the go ahead?

A girl in my class did this and everyone teased her as they thought she must have had nits.

Hopefully school has moved on since then.

I forgot to mention that when my DD had hers cut really short, it inspired three others in Y4 to do the same. Some other girls locally went to the same hairdresser and asked to have their hair cut like DD's so she set off something of a trend locally in girls under 10!

I think DD has a very feminine-looking face but the majority of the population seems to see short hair and assume she's a boy. That may be different with a buzz cut.