Express how you feel about the conduct, why it bothers you, and make a request. Do not, under any circumstances, ask him NOT to do something. That will incite him to revolt. Instead, request that he do something, such as be considerate of your neighbors or use the horn when you are not around. If he refuses, then express your disappointment but remain calm.
You can also say "Please don't..." or "I beg you not to..." This is an effective way to get someone to refrain from doing something they might otherwise want to do. For example, if you want them to stop whistling in public, you can say "I beg you not to whistle in public." This uses the formal "you" instead of the more familiar "he" or "she."
The word "please" is used to gain attention and show respect at the same time. It is always appropriate to include this word when asking others to do things that might be difficult for them to do (such as leave town, stop smoking, or lose weight).
They all convey the message that what you are asked to do isn't very hard, and may even be enjoyable for some reason or another. Asking nicely shows that you are willing to work with others to reach a common goal.
Make the request as light and informal as possible. Recognize that while this may be a difficult talk, it should not be violent or harsh. You are requesting that someone modify their conduct for you. Respect what you are asking of them, and don't make a huge deal out of their actions. This is a request, not a conflict.
Your request could be as simple as saying "I'm sorry, but I'm trying to have a conversation and you're making it hard for me by talking too much." If they continue to snap their teeth at you, say "Thank you" and walk away. Do not argue with them or get in their face. They are being rude, so let them be rude until they realize how inappropriate their behavior is.
If you are in a position of authority over them (such as a teacher speaking with their class) then you can simply tell them that they are being inappropriate and ask them to stop (or give another warning). If you want them to understand why it is wrong behavior then explain that this is a polite society and if they want to be considered civil then they need to stop doing whatever it is that gets them into such bad habits.
Finally, if none of these methods work then you must use force! Grab them by the neck and drag them away from the other people. Do not worry about hurting them, even adults can be taken down easily if you pull their hair or slam their head against a wall.
An forceful and considerate approach, on the other hand, might reduce the likelihood of repeat maltreatment.
Inform the individual that the conduct disturbs you.
Begin by expressing your displeasure with the conduct and requesting that it cease. If the harassment continues, consider alerting the police and strengthening your protection. In rare cases, you may need to request a restraining order to keep your harasser at bay.
Harassment can be any form of illegal discrimination, including but not limited to: harassment based on race, color, religion, national origin, ancestry, age, gender, sexual orientation, disability, or veteran's status. Harassment also includes retaliation against anyone who opposes such conduct. This definition applies to federal laws as well as those in most states. In addition, harassment can include any type of violent crime, such as assault, battery, stalking, or murder.
People may harass others for many reasons. For example, they may do so because of prejudice, such as racism or sexism. They may also harass others because they are jealous or want to get back at someone. Sometimes people engage in harassment because they feel like it is their right. Under some circumstances, it may be legal for someone to harass you. For example, if you are trespassing on land that someone owns and they tell you to leave, then they have the right to ask you to stop harassing them. In other situations, particularly where there is no law protecting individuals from harassment, people will often harass others to get attention or simply because they can.
If someone's whistling bothers you, simply ask him to stop. It's never impolite to "ask" for anything. He has the option to quit or not. If he does not, there is nothing more to say on the subject.
So, if you have a flirtatious nature, here are some pointers on how to avoid luring him on.
That is all you would need to say if you spoke it quietly. If you ask them if they don't mind turning it down, they might not turn it down far enough. I'd be confident and avoid acting as though you're begging them to do something.