That's because most of these people spoof their numbers and just use random numbers. Sometimes they'll even use legit business numbers. I had a number call me one time and when I called the number back, it was a business owner explaining to me that he has been getting calls all day and hasn't called one person.
Rodger, Knowing the volume of calls helps. I didn't answer at 12:09 pm They left a message that was close to, "FBI reports there is a home break in every 15 seconds. If you let us install a sign in your yard you can have a home security system installed for no charge."
No company name. It very well could be thieves (with forged caller-id) looking for a target.
The time factor of 15 seconds is not relevant to the analysis. 1.4 M residential robberies. (https://ucr.fbi.gov/crime-in-the-u.s/2010/cri ... les/10tbl23.xls) Average value of goods taken $2200. Number of households, about 80 M. Some simple math tells us that you loose an average of $40 per year in robberies. Some people don't trust the media. Realitic check for this word problem: how many robberies have I known about? A few cars and two homes. The numbers are reasonable.