It occurred to me we could have a running tab/thread of known scammers. No need to start a new thread every time we run across a new scammer. Just add here. This thread will then continuously get bumped (sadly) and will hopefully come up should anyone search a user name or email when doing due diligence. If this takes off and is well used, great. If not, well, here's my known scammer.
Here's a user name and the email he PM'd to me in response to a recent wanted ad I had running;
jonhtrey0 (zero posts)
jsmith990088@gmail.com (asked for venmo or cashapp payment only)