This could be dangerous depending on what the telemarketer is saying. TM: Would ...

pavel_lishin · on Feb 5, 2016

Who would the telemarketer charge? I don't think you can initiate a charge to a phone number unless the number itself calls someone, can you?

zo1 · on Feb 6, 2016

If it's from your provider, yes, they absolutely can. Because on their side, the number links to a "specific person/account", and they will charge to that, or add the service to that.

vinceguidry · on Feb 5, 2016

They can't actually charge you unless they have payment information. Which you obviously wouldn't give to the bot.