I'll have to disagree with you here JoelKatz.
The contract was made on assumptions that Patrick made, sure. But that doesn't mean he can back out of his contract scot-free just because his assumptions were wrong.
If the bank loans me $1,000, and I wanted to use that $1,000 to invest in a business that I assumed to be risk-free, but it turns out the investment DID have risk, and I lost the $1,000, would the bank just let me off the hook? Nope, they'd still want me to pay back the loan, regardless of what my assumptions were and how those assumptions turned out. Would they hit my credit score when I failed to pay the loan back? Of course they would!
We're hitting Patrick's Bitcoin community "credit score" because he failed to hold up his end of the bargain. It doesn't matter that he didn't realize he was investing in BS&T passthroughs - that was a failure on his part to do due diligence, and it is his responsibility to own up to that mistake and still make payments according to the contract.
Now, if he had worded the contract with a clause something like "If my investments fail, then your investment with me is worth nothing," then I can definitely see a case for NOT giving him a scammer tag. Otherwise, this is nothing more than him failing to hold up his end of the agreement, and he should get the scammer tag until he makes good on the promises made to those he contracted with.