Either way, please be sure to help newer and less experienced players so that they can protect their December 18th release pets from ninja traders!
Here's some tips for new players who may be reading this.
Q: "What is ninja trading?"
A: Ninja trading is the intentional act of targeting players who are not well versed in rarity and value to trick them out of their rarer pets. Basically, the ninja trader will send a trade to another person offering rather low value pets for something much more valuable, but does not tell the other person this.
While in literal terms this is an act of scamming, it is not considered a scam under CS rules as it is impossible to tell somebody's intention (a suspected ninja trade could simply just be a bad offer by someone else who is just clueless about rarity and value, so separating this from scamming was a necessary evil that prevents false scamming reports).
Therefore, CS regards "scamming" as outright telling the other player that their pet is worth less than it actually is. A rule against ninja trading cannot be enforced as the person doing it simply does not state anything regarding value; they will either send a message asking if the other person would like to trade, or will not send a message at all.
However, we know this occurs because...well, there are people who admit to doing it. So these people are definitely out there, and are looking to swindle you out of your valuable pets!
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Q: "Why so much concern in December, especially December 18th in particular?"
A: On December 18th, a special gift box is released that gives each player random pets. These random pets are re-releases of older pets, which often includes pets from as far back as 2008. This means that you have a shot at some EXTREMELY valuable pets. Meaning, even newbies can receive 2008 VRs or OMGSRs. Ninja traders are opportunists and will take advantage of a new player's lack of knowledge to snatch these pets from them.
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Q: "How can I protect myself and others from ninja trading?"
A: There's a few things you can do! Here's all the advice I can give to best protect yourself and your valuables:
> If you have not already, create separate trading groups for your pets, and lock ALL groups that are NOT up for trade,
INCLUDING your default "Pets without a group" group. Keep your December 18th release pets in one of these locked groups until it grows, so that you can determine its exact value.
>If you receive a trade for rare pets, check in with the FTT, or "Fair Trade Thread".
>Spread the awareness to newbie players! The more people there are who know, the less victims there will be!
INCLUDING your default "Pets without a group" group. Keep your December 18th release pets in one of these locked groups until it grows, so that you can determine its exact value.
>If you receive a trade for rare pets, check in with the FTT, or "Fair Trade Thread".
>Spread the awareness to newbie players! The more people there are who know, the less victims there will be!
I think that's all for now! If you have input as to how I could make this post more informative and helpful, please point out anything I missed! Let's make this a fun holiday season for everybody who isn't a ninja trader!
I love this 
