Do you know someone who is annoying? Do they annoy you? Do you have no idea how to deal with them?
Then read this Instructable and you'll find out.
Warning: Not 100% guaranteed
Step 1: Tell them
This is probably the easiest step, but also the hardest.
If you have enough guts to, and are not afraid of akward moments, then you should just tell them they are annoying. This step is also dangerous in that it may get you hit.