DDoSing is a dangerous tool people can use to remove someone from their internet by overloading their connection. It is something common in online gaming, you might have heard someone say one time or another, "I'm going to DSoS you!". Now usually, if you are the one hearing this, you would not have to worry about anything. However, if that same person invites to a party or a voice chat, he can gain access to your information and DDoS you. Definetely be aware, and join that random persons party. Also, don't trash talk online to get into this situation in the first place. It matters what you say, and can affect you later on. Be cautious, and be nice.