dryer protocol

I've always cleaned the dryer lint screen before each load, like the manufacturer says. In this apartment building's laundry room, I almost always find the screen already cleaned. People clean their own dryer lint.

Now this strikes me as socially responsible and morally upright. But I feel obliged to check beforehand anyway, because you never know, and if other people do too, well, it's consuming a bite extra of everyone's life to check before and clean after. Can I condone that? On the other hand, can I let concerns of efficiency disrupt this community of ethical behavior?

[Poll #24924]