How to handle loud cellphone talkers

A number of times I have experienced this annoying habit in people not only making a racket and a nuisance of themselves talking on cellphones without and with bluetooth handsfree devices tucked away in their ears. I found this appropriate video for sharing my angst. Watch the fun unfold here.
These day cellphone jammers are being used by private individuals (though it is illegal)who effectively jam out the signals of loud talkers around them. Cellphone etiquette has still not quite caught on if people are desparate enough to use private jammers!