“Just because you're paranoid doesn't mean they aren't after you.”
Joseph Heller book Catch-22
Source: Catch-22
Song lyrics, Nevermind (1991)
Variant: Just because you're paranoid doesn't mean they aren't after you.
Source: This quote is generally attributed to Joseph Heller from his novel Catch-22, although it appears to be from the film version only (screenplay by Buck Henry.) https://en.wikipedia.org/wiki/Talk%3AParanoia Territorial Pissings.

“Just because you're paranoid doesn't mean they aren't after you.”
Joseph Heller book Catch-22
Source: Catch-22
“Just because you're funny doesn't mean you get to be cruel.”
Libba Bray (1964) American teen writer
Source: Beauty Queens
“Anyway, just because you're sworn enemies doesn't mean you can't be friends, does it?”
Terry Pratchett book The Carpet People
The Carpet People (1971; 1992)
Cory Doctorow (1971) Canadian-British blogger, journalist, and science fiction author
Cory Doctorow on the Open Rights Group (Time: 3:25) https://upload.wikimedia.org/wikipedia/commons/c/cc/Cory_Doctorow_on_the_Open_Rights_Group.webm <br class="br">Context: As someone once said, "Just because you're not interested in politics does not mean that politics won't be interested in you." And staying away from politics either because you think tech will make laws irrelevant or because there's no good way to influence laws just opens the field for people who don't cherish either of those illusions to make things very bad indeed.