So for the most part I would say "either swear or don't", but if you are going to play that game, you need to be better at it, and call it something like "a big functional rocket" or "a big futuristic rocket", which is plausible, and then remain completely straight-faced, forever, never admitting in public or private there could be any other meaning for the acronym, ever. Leave historians a hundred years from now guessing.
"Wink wink, I'm not cussing!!!" is just another version of "I'm not touching you!!!".
You just picked out one example. That defies my definition of generally?
Also, loanwords like fakku are a legitimate part of the language. The katakana script is used almost exclusively for them and many sentences have them, spoken and written.