Yes, because to be fun you have to believe in faerie tales rather and facts and reason.
Also, I am a grown man. Parties are for children.
You, sir, are missing out on some parties if you stopped going to them after childhood.
The water near the center would boil, bubbling up through the water higher up in the tunnel to create a steady plume of steam at the surface. This would end up as increased cloud cover and precipitation over large parts of the world.
Really? I would think it would cool somewhere on the way up. Volcanic activity on the ocean floor that boils water doesn't make it to the surface as steam.
A meeting is an event at which the minutes are kept and the hours are lost.