Digestible maybe, but swapping "friendly" in for "fucking" changes the tone and intent of someone's statement. At least "freaking" expresses similar, if muted, exclamation.
A recipient who is being not-so-subtly reproached with an F-bomb acronym might misunderstand what is being implied.
A recipient who is being not-so-subtly reproached with an F-bomb acronym might misunderstand what is being implied.