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Re:Ringless voice mails from telemarketers by function_seven on Saturday June 03, 2017 @06:45PM (#14478900)
I’m afraid my number might be used as the originator someday. Often when I get these calls, I keep them on the line as long as possible, feigning interest in whatever they’re selling. I figure as long as I tie them up, maybe I can waste a bit of their resources. Probably futile, but makes me feel better.

Except they might retaliate one day and set their outgoing ANI to my number...

Re:Ringless voice mails from telemarketers by rdtsc on Saturday June 03, 2017 @07:26PM (#14479059)
I do the same. A few of them got very angry, yelling quite creative obscenities. Some were amusing and I had never heard of. I took it as a an enriching cultural exchange. But did realize they have my number and could do something like what you suggested.
Re:Ringless voice mails from telemarketers by sillysaurus3 on Saturday June 03, 2017 @08:01PM (#14479174)
It's a fun hobby to learn to swear in all kinds of languages. Russians are very creative in this respect.