[philman_36]

Now then, we've established that prohibition CAN and DOES work.
Where was that established?
The first Prohibition showed just the opposite. And as evidence that prohibition CAN and DOES work you use "trespassing" as an example? HA! Too funny.

[philman_36]

Awww, come on guys...come sing another verse so I can sing along.
I'm just getting to clearing my throat.
Mi-mi-mi-mi...

[GLDNGUN]

The first Prohibition showed just the opposite

That's because it wasn't really prohibition. It was NOT illegel to possess and drink alcohol for personal use. What kind of prohibition is that?

And as evidence that prohibition CAN and DOES work you use "trespassing" as an example? HA! Too funny.

Again, your argument was shot down in flames. It certainly is a form of PROHIBITION and it certainly works. Of course, that's merely ONE example, but that's all you asked for. Are all prohibitions 100% successful? Of course not. Most aren't. People still do all kinds of things, despite prohibitions. Wouldn't it be cheaper and more economical to just not have ANY laws to enforce? Of course, but at what cost to society?