Games with matchmaking will permanently ban your account if you leave games too often. It's a risk: "CS:GO - Competitive Cooldowns and Bans - Steam Support" https://support.steampowered.com/kb_article.php?ref=1203-WJC...

How many competitive games are you playing where the enemy team is an admin on your teamspeak server and feels it is appropriate to ddos you?

All sorts of things can leak your IP. Source engine is one, Teamspeak is another.

Sure, but that doesn't help you in the midst of it.

It's also like, sort of kind of not how social games work in many cases. In order to make friends in the first place, you gotta get out there.

Do you want to be friends with people in a community where having the admin look up your IP and ddos you is acceptable???

Imagine I want to go out tonight. None of my friends do. So I go to a new place and start talking to people at the bar. One of them stabs me.

No, I do not want to be friends with those people. But I don’t know that yet, because we have not met. The only way to meet them is to... meet them.

The consequences of being ddosed are not exactly the same as the consequences of being stabbed. I think you'll survive this terrible, unlikely ordeal.