^ False. I was out of play and my only concern was getting refilled as quickly as possible so I could get back in. (I had no bottles around at the time and had to detach the 150's reservoir and take it to the river to fill up.) The real problem is that I had no way to indicate that I was out of play when you shot me. (Which I knew, but there wasn't much I could do about.)
Also, most people do not yell clear when they re enter the game.
And that needs to be fixed. See "Obligation to Spawn" in the OP. As brief as we need to keep the spawn rules' explanations, this part has actually been ambiguous and we never agreed on whether there is any Obligation to Spawn in the first place. Just as you assumed that you have to spawn, I assumed that you don't, because it doesn't make any sense to. DX has the right idea on choosing to spawn after anyone in the area leaves (i.e. no obligation to spawn), although this won't always work in practice. Anyway, it's clear that we're not in agreement on the spawn rules we're using, judging by how DX and I demand everyone yells "CLEAR" when spawning in, while you don't have a problem with silent spawning.
Now, back to the game we were talking about, it actually would've been legal for me to spawn in and shoot you at the same time, but I didn't because I wanted to stay out of play while refilling. But if it happened, this is where the problem comes in of being able to easily indicate that I'm eliminated; you wouldn't have realized I was out of play, so it wouldn't have been fair if it happened that way. As it stands, you simply fired at someone out of play, which doesn't count for or against anything.