Well if you care to have a touch of a fun....(fun being bored as $#^% and needing something/anything to alleviate said boredom)
set a calltone for your phone and from another phone call it repeatedly. about one in 5 calls you won't get the call tone, but you'll hear another person's conversation instead.

I'm wondering if this is going on everywhere in the country or just where i am heh.