I obviously didn't reply to your post since I began it with a quote from Titus. But, I will address it now.

You said that it would be convincing if you got a group of 10,000 people to agree with everything you say. It would be convincing, but 10,000 people will never agree with everything you say. There will always be troublemakers, and there will be those around who will simply be defiant.

To nitpick, people would have coke, and it would not turn to sprite.

And, what relevance does tearing a branch from a tree have?

Your explination of turning water to blood is... almost feasable, but think of the plagues of frogs, gnats, flies, and locusts?? Could you rig that up... a couple thousand years ago? I wouldn't say so. And the hail, and the curse of the livestock dieing, and the 1st born children dying.

I don't see any other explination other than divine intervention.

What is it they say about silence being golden?