Quote from: pc on July 23, 2013, 01:28:21 PM

Yeah, OP_TRUE and the like are the same as a widely-known private key. I don't see what advantage you get from treating them different at the protocol level, though I suppose a smart client could attempt to inform the user if a payment they received was more likely to be attempted to get double-spent than average, but I'm not sure the user would or should do anything different in that case anyway.

No current client will tell the user "hey, I found an anyone-can-spend" nor list that in their balance.

Clients pattern-match output scripts, and only "see" ones with scripts they recognize.

All other transactions are simply invisible without special software to find them and spend them.