A lot of people think it's laughable that anyone would fall for "simple obvious scams" but I've met a good handful of older family and their more elderly friends who either fell to a scam or were only stopped once someone at a store questioned them as to why they were buying lots of gift cards all at once. In some cases scammers will work on people over a long period of time to gain their trust.
I've had people in my close family fall into debts to those folks, they target the weakest and literally go heaps and bounds to extract as much as they can from their 'mugus'.
Not fun at all :S