A reminder of what the eight worldly dhammas are: there's praise and blame, fame and obscurity, pleasure and pain, and gain and loss. What are the dangers of attaching to them? It's Dukkha! Lots of pain. If you only want fame and you say to yourself "May only fame come to me. May no obscurity come to me." Is it going to happen that way? "May only pleasure come to me, may no pain come to me." Is it going to happen that way? Even the Buddha got all of the four kind of unpleasant ones, he got blame, he got obscurity, he got pain (not much, but he got some), and he got loss.
We all get these eight from time to time. Generally people like the four nice ones, they don't like the four not nice, unpleasant ones. But it's interesting at times; if you're caught up in self-pity you actually want the unpleasant four. "I deserve to be blamed, I deserve to suffer, I'm a jerk. I haven't done it right." It's interesting at times to see how people actually attach to either side of the four. But really it's more profitable to attach to the pleasant ones. That will lead you towards doing good rather than wallowing in self-pity.
But if you attach at all, in an unhealthy way, in an unwise way, you're going to have Dukkha because then that's all you want. As I said at the beginning, "May only praise come to me, may no blame come to me," and so on. Well it's just not going to happen, so if you're attached to only getting praise, to only getting fame and so on, then you're going to suffer eventually. So, the danger of attaching to the eight worldly dhammas is that you're going to have Dukkha.
Now when you think about it, within Buddhism, the thought of becoming, craving, craving, becoming; that's the cause of having Dukkha. As long as you want fame, aren't you seeking for something in the future? Because if you don't have it right now, you're seeking. It's a future thought. If you want pleasure, and you don't have it right now, then you actually want the future thought, so you're actually just caught up with future, future, future without being content in the present moment.