How do I make every member a moderator?

Even when they first sign up.

Hmm you really want to make them all mods of your forum hmm why LOL
Anyway if you want to make all your members a mod you have to do it one by one and add them to the mods Group your self

it cant be done by any other way Sorry.

Is there a reason as to why you want them to be all mods. That means they can control the forum as much as they want and like. They can ban members and virtually delete the forum's reputation. You may want to reconsider it.

I have found from personal experience that the more mod's you have, the more chaotic the forum.

hmm...... Are you sure

hmm maybe you can change the member name to moderator so it's faster cp>users & groups > * Group Administration and go to members edit it to Moderators