In the last 3 years I've probably distributed at least a dozen notes on as many Crossfires I've seen parked. I've also personally spoke to 4 or 5 Crossfire owners, inviting them to check out the Forum.
I have yet to see anybody join and admit to being directed to the forum by a note left on their car.
I know (to most of us here) it's hard to think of the Crossfire as nothing more than mere transportion. But it seems that many XF owners do.
Or maybe most Crossfire owners simply don't take advantage of Website forums.
I'm going to continue putting notes on every XF I see, so who knows, maybe eventually somebody will respond.