Managing personal Outlook.com account settings, security, and privacy
I open the preview and if convenient and I have the time I call the number. I don't do it every time but if we all called that number we would be forcing them to answer the call and waste their time. I don't yell at them or anything like that. Sometimes I don't say anything at all. Maybe, "just wanted you to have to answer the call".
Imagine if everyone who got a spam from them called. Imagine thousands of people calling, wasting their time. But no, we just delete and do nothing. It is often satisfying when they eventually understand why I am calling and and get mad. I've had some yell at me.
I'm sure my return call doesn't do much but imagine what we could do united. Everyday hundreds of thousands of us calling to make them answer the phone in regards to that BS "Geek Squad" or "Norton" invoice.