They don't ask for any id however be very careful trading on localbitcoins. I've done a number of trades there and the number one type of fraud is stolen bank funds. So the lesson here is to wait at least 7 days after the bank deposit before releasing escrow.
This is of course only if you trade with someone who accepts bank transfer.
Good luck,
Explain please.
Sure. Generally people attempting this scam will set their buy prices a fair bit higher than everyone else. I have easily seen anywhere between 25 - 35% the market rate. Here is an example of such a user,
https://localbitcoins.com/accounts/profile/Jacopdunn88/feedback