I have this game where I try to keep phone scammers on the line as long as possible. I consider my time valuable, but I figure if enough people string them along and waste their time, then there will be less time for them to scam people who are more vulnerable.
Lately though it seems like they are catching onto this technique of stringing them along. The last few times they've called me, I must have sounded too enthusiastic because they've hung up right after I say "I would LOVE to hear more about lowering my interest rates!"
My original thought was that they keep records on their system about who messes with them, but if that was the case, then they probably wouldn't call me in the first place. So they must be really good at detecting mock enthusiasm. Most people are probably skeptical, so next time I have resolved to saying something like "This isn't a scam is it? because I'm really hard to scam" or something along those lines.
Either way, these types of calls have been increasing, so while some people look at it as a big hassle, I look at it as refining my technique.