LSP Blinder is undetectable so who knows if it's already in use? No one! Since LSP Blinder ruins LSP heuristics and no one knows if it's in use, LSPs can't know if their heuristics work. They can't know who the sender or the recipient is.
Discussion
I issued a public challenge to Phoenix Wallet here: https://x.com/SuperTestnet/status/1916838692259299818
They claim they can trace bolt11 payments to their destination if the sender uses their software. Let's see them trace mine!