Happened to me in the past with a fake token as well:
https://bitcointalk.org/index.php?topic=2335323.msg23758209#msg23758209So it's definitely nothing new, and there is absolutely no excuses in sending fake tokens like this. But this is one of the things that if you are lending you need to be careful of, always verify the legitimacy of your collateral especially if you are unfamiliar with the coin.
If it's a legit token that someone is sending as collateral, then etherscan will usually have some sort of link that redirects to the official site. You can always check the official contract address as well to be sure. Asking the tokens to be sent to an exchange to guarantee its legitimacy isn't a bad idea either, though you need to be careful that the exchange is trusted.
Could be interesting to see if these people are all alts of each other, since their scamming styles are quite similar. All speculation though.