Honestly. The callers are breaking the social etiquette by making unsolicited calls, however if we pick up we feel obliged to be polite. Fuck that, hang up on their face.

Why?

That's what I do, too.

If it's a spam call, often you will hear nothing until you say hello. When their auto-dialer hears you talk, it connects you to a real person, who informs you that the Windows box you don't possess is infected with a virus or whatever.