Chrysanthemum
If you pick the wrong kind of flowers, you'll be put into prison with nothing but rice to eat. You'll especially want to avoid picking chrysanthemums.
Chrysanthemums are super important in Japan because they're the symbol of the imperial family. They're even on the cover of Japanese passports. Please don't ever pick them unless you want to end up in prison eating only rice for the rest of your life.
きく
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If you go to prison for chrysanthemum picking, everyone in the prison is going to kick (きく) you nonstop. You broke the chrysanthemum picking law, so kicking is your punishment. And believe me, you don't want these kicks.
Imagine holding a chrysanthemum in your hands while you get kicked over and over and over in prison. Was it worth it?