Earlier quoted context omitted.
Exactly 1 swear feels indie and charming. More than that feels like trying.
Ah, the MPAA way. It's hard to get the "angry owner" tone out with one swear, one swear says "professional but kind of flustered". I don't like gratuitous swearing either, but I think I got it right with the copy there (at least for my aesthetic). It's been a while since I read all of it at once, though, I wil re-read and adjust, thanks.
If this is your hobby project, I doubt you are looking for enterprise signups who are pretty anal about such things. This will mostly used by individuals, who mostly wouldn't mind at worst, or be amused by it at best.