i'm like 95% sure that macho is meant to not be able to be protected by anything (although there was a very entertaining NRG argument over whether that also extended to rolestoppers, from which we have one of the all-time great quotes: "If you're Macho and someone tries to rolestop you, you never realise you're being targeted for a kill, so your machismo never gets challenged.")
(maybe
@implo
can weigh in but yeah i'm pretty sure that's how it is)
i'll edit the wiki article to make it more clear