Outsiders tend to scoff at Esperanto as an idealistic waste of time.

He scoffed.

I'm not going to change my opinion no matter how much you scoff.

They all scoffed.

Tom scoffed.

Engineers scoff at creative people during the day, but then go home at night and worship fantasy worlds authored by creative people.

They scoffed at our efforts.

Scoffing won't get you anywhere.

She scoffed at my poem.

If you want to change someone's opinion on something, the worst way to do it is to scoff at them.