because if you do start shaving, the hair on your legs will grow quicker and more hair will grow and it will start becoming noticable and also if your leg hair is not noticable i wouldnt waste my time cause trust me once you do start shaving it will start becoming annoying and you would just wish that you didnt have hair on your legs or if there was a world wear girls didnt have to shave their legs just like guys
First off, that is a full on myth. The hair does NOT grow faster, and your legs certainly don't miraculously begin sprouting more and more hairs like you seem to think. Your hairs certainly won't get darker either.
On subject, I've been shaving since middle school. Mostly because I felt uncomfortable wearing capris with even remotely hairy legs; my legs had very fine, thin hairs and they still do but I shave anyway because I don't feel right if I leave it.