I don't know if there's a way around it but my first thought is that if you're hardcore enough to be needing to run code that's signed with a blacklisted ID, yo

I don't know if there's a way around it but my first thought is that if you're hardcore enough to be needing to run code that's signed with a blacklisted ID, you're way more than hardcore enough to be able to easily make an unsigned (so can't be blacklisted) version of the binary. So if I were Apple I wouldn't waste much time or UI space on it.