How to stop Craigslist scams

Hello,
Like all Craigslist users, I have been contacted be a "potential buyer" who is willing to pay full price for my listing and wants to send me a check for the purchase price plus extra funds for the shipping. Once the check has cleared, I am to forward the shipping fees to a third party.
I receive this request on 85% of everything I list and am tired of it. So... I've decided to give these low-lifes a head ache and I am hoping everyone else will do the same. I give a false name and address and act thrilled that someone is buying my stuff at full price. The cons overnight me their fake check at which point I tell them I didn't receive it and ask that they cancel it and send another. Once I have it I tell them it has been deposited. They contact me the next day and tell me it has cleared their account and would like me to send the balance via Moneygram. At this point I screw with them and give all sorts of reasons why I couldn't send it right away. Next , I sit back and laugh as they send me all kinds of messages. I have even been told that I have been reported to the FBI !!!.
These scumbags contact thousands of people with the hope that a few will respond. If they have to overnight thousands of checks, they will be overwhelmed and their costs will be extremely high.
I'm hoping enough people follow my suggestions and we put these people out of business.
Beamer

Welcome Beamer,

I'm glad you recognized the scammer for what he was.

However, we cannot recommend the course of action you are suggesting, for several reasons.

The first is that your Craigslist account is presumably traceable to you, and it is never a good idea to play with criminals of any kind without being completely anonymous.

But, the most important reason is that repeatedly having the scammer send new checks will not quite have the effect that you intended.

Check scammers don't spend their own money on shipping checks. They typically use hacked or phished shipping accounts belonging to innocent victims, or they open shipping accounts using credit cards stolen from innocent victims. By convincing the scammer to send new checks, you simply increase the fraudulent shipping charges. The victim will file a claim for the fraudulent charges, and either the shipping company or the credit card company will end up absorbing the cost. Ultimately, those costs will be passed on to the rest of us customers.

Printing, too, is an issue. While they are sometimes accomplices, scammers often use victims to print the fake checks used in these scams. They recruit these victims via bogus job ads, claiming that these are "accounts payable" or "payroll processing" positions. The victim who printed the fake checks often ends up eating the cost of printers, special papers, and inks, so once again, when you demand new checks, it's not the scammer who pays.