Do you beep people?

This might be a stupid question but are you supposed to beep people for things like them cutting you off and shit? I beeped someone yesterday cause they cut me off at a mini roundabout and i literally had to almost stop, I then felt bad about it after but at the same time I remember last august when i had only had my license a few weeks and had just got my first car and was driving to work, was going pretty slow as i was a new driver and also not used to my new car and some fatass in a golf beeped the fuck out of me illegally overtook me then looked back in anger so why should i feel bad