I believe that that may be too severe a word, no? Because you may disagree with the design decisions made by those Samurai developers, and they may actually be flawed, but I believe they come from a position of honesty. If indeed wrong, it will definitely come from a position of learning even though it will be learning the HARD WAY. But scammers? I believe not.
Samourai has nothing to do with the "mixing sites" advertised by scammers here.
How are random people displaying advertisements of mixers in exchange for some Bitcoins = scammers? The campaign managers vouched for them as actually not "scams", many of the mixers advertised were actually not "scams", and no one in BitcoinTalk actually wanted people to get "scammed".
¯\_(ツ)_/¯
Plus centralized mixers indeed provide a service, no?