Scamming the scammers

First off I am only posting anonymously because I want honest opinions not based on personal feelings about me.

I saw a post on Facebook about a way to make $350 a week to put a decal on my car. Said they would pay me up front for the first week and also cover the cost of putting the decal on my car. I emailed my information to this guy and he said he would contact me after he mailed out my first check.

Well after some research, I discovered that it was a scam where you deposit the "check" into my account, remove the money, and mail it to a third party and when the "check" bounces I am on the hook for $1800. When I started asking questions, the emails and phone calls stopped and the phone numbers to reach the "manager" are disconnected.

So I decided that once I got the "check" I would just destroy it. After posting pics to the post on Facebook to warn everyone else who commented. Well it came in the mail yesterday. Much to my surprise, it turned out to be 2 money orders addressed to me. So I went to Walmart (they were Walmart Money Gram money orders) and got them cashed with no issues. Not one problem just $1800 in my hand.

Am I wrong for keeping the money even though they originally tried to scam me?

I would like to add that I called (after cashing the money orders) and the numbers are STILL disconnected and my emails have all been returned as "not valid address".

*EDIT* Forgot to mention that this was supposed to the only time I got my "payment" mailed to me. All of my next "payments" were supposed to direct deposited into my bank account. So the "hiring manager" needed that information(account #, routing #). When he asked I told him I didnt know it (which is true and why my hubby started asking questions), and he said he would get it from me after I cashed my first check.