You recall the old career thought experiment: “What would you attempt to do if you knew you could not fail?”
So, here’s one: Calling to complain about an immodest advertisement.
My Yerushalmi friends only complain if it invades “their” neighborhood. But if you believe the land of Israel is going to be Judaized sooner rather than later, and by human effort blessed by Divine providence, well, you tend to do a lot more than if you believe it’s all bad and all going to get worse and nothing but Mashiach will help any.
That’s one Nafka Mina.