A "complying poster" is one who is compliance with this agreement.
Yes, it most certainly does have something to do with signing the agreement. First line of the agreement:
Effective August 9, 2003, we, the undersigned, freely and in good faith agree that henceforth we shall treat others on these threads as we wish to be treated ourselves.To be in compliance with the agreement one must have, among other things, "freely and in good faith agreed that..."
Not only did you not so agree, you explicitly rejected such agreement. You are not a "complying poster".
I accept your apology.
No apology was offered, nor required.
True. But there are several regulars in our threads who haven't bothered themselves with the agreement at all, who were absent from the drafting thread, who avoided all the quibbles and petty disputes, but who nevertheless conduct themselves as if they were complying posters. That is, their posts are always respectful, never provocative, never spamming, never involved in nit-picking irrelevant trivia, etc. We might consider them "virtuous non-signers."