"Is it invariably wrong to act selfish?"
"Is consequentialism or deontology right?"
"How certain does induction make us?"
"What's a certain statement?" (as in come up with one)
"What would make a good foundation for our knowledge?"
"What's more important, my joy, or starving children in Africa getting a meal?"
"Is love or happiness more important?"
"What if I have to go to the doctor, but my child doesn't want to wear his seatbelt, and I'm in a big hurry, then can I beat him?"
"Did you know that two thousand rain forest species go extinct every year?"
"Did you know that if we don't anchor Australia, a sea snail might be crushed?"
OK, some of these are kinda cheating, but some are incoherent philosophical garbage that a lot of otherwise reasonable people waste time thinking about.
(I don't think these examples are very good. As I don't spend my time on this kinda question, I'm not all that familiar with many of 'em. I tend to stop reading in disgust when I encounter them, and then forget about it.)