A friend's mom fell for the "cash our totally legitimate [wink wink] checks and money orders for us and you can keep ten percent" scam. They cleaned her out. I feel a little bad for her (more for him because guess who had to step up and cover bills and mortgage payments). But I don't feel a lot bad because she wasn't old and senile. She got greedy tunnel vision.
If some company has tens of thousands of dollars in legitimate checks and money orders to deposit, they can get a bank account. The bank will assign them a personal banker who will stroke their egos (at the very least) every time they walk in the door. They won't need to find random people on the internet to cash the checks for a 10% fee. That's ridiculous.