Many scammer use this to cheat you.
If you use a little prevention, it will save you a lot of headaches.
SO many people post up in here complaining they just got reverse trade scammed.
Why does this happen? Because the scammer was on their friend list.
I have payed this game for 14 months and NEVER ONCE been scammed.
That's due in large part to the fact that I delete all friend requests that pop into my mailbox out of the blue.
Then, every so often, I delete most of my the people on my friends list.
Those who need to be there will invariably shoot me a message asking why I deleted them and get added back.
Finally, and I m guilty of neglecting this, read your trade mails before accepting them.
I know, you just posted 1gc for 400 water and got 97 replies, but if you just add friends like it's Facebook, that's how the reverse trade scammer gets you by sending the trade of 400 water for 400gc hoping you'll click before reading.
A little common sennse and prevention will go a long ways towards protecting you from the scum.