Is a hainet necessary if my hair stays neat without it?
I know that hairnets are useful for keeping your hair from being all over the place in a show but are they required? I can put my hair in a small bun and then I wouldn't need one. Te hairnets don't even hold my hair anyway. So can I get away without one? Also I've noticed that a lot of people wear their hairnets over their ears. Why? That looks weird and I can't imagine that it's comfortable.
I don't know what division you are showing in, but in saddleseat, it definitely provides a more finished and polished look. I would imagine it is the same for other disciplines. You may think that your hair stays in a bun all by itself, but after a long class on a saddle horse, a round of jumps, or even riding a pleasure horse...little flyaways can and do appear.
Not so sure about the hairnet over the ears thing, though.
Though they are not required, I strongly advise you to where one. You may think thtat in a bun your hair will stay neat, but after riding for a little while there will be flyaways. And it alway looks more polished to wear one. And it is correct to have the hair and hairnet go over the tips of your ears (at least that's what I learned). But you don't feel it at all. :)