I love how TF2 players collectively seem to respect those who can pull off taunt kills. Probably because not only is it difficult to pull of against competent people, which can be pretty fairly common to come across nowadays since the games been out for years, but also because it can be very fun to do and pull off as well. It’s stuff like this about the community that keeps me going.
If you crouch underneath a surface and can't un-crouch, you would normally be stuck there, but taunting seemingly ignores the surface above you. Because of this, the explosion from the equalizer taunt technically happens above you and doesn't kill you.
Distributed denial of service. The most basic way of explaining it is that someone overloads the server and slows it down so much that it can't handle players anymore and it crashes. (This is a very abbreviated explanation)