Patrice, a big ol' THANK YOU from me as well.
I like your approach. Might I suggest that instead of agonizing over what hits where on the blush-o-meter....just announce that if it causes the moderator to need to ask themselves the question of whether or not one is appropriate, it gets deleted. When in doubt, toss it out. Having access to jokes is nice, but not a necessity or requirement or related to quilting. It's a fringe benefit, not a right. No one (but ourselves) should be appropriateness police of our own jokes and we definitely shouldn't put that burden on a volunteer moderator and then nit-pick about it. We're grownups, we know what should or shouldn't be posted in our community.