Agreed we all have been plagued by these unwanted calls which we never liked. But is it correct to make fun of a fellow human being ? He/She is merely doing his/her duty. Are you getting threatened ? Why you cannot tactfully end the conversation/call ? All of us want an escape route. Why we never shout at food vendors when we go to a street littered with food stalls ? Or whey nobody shouts at the vendors at Janpath ? Have you seen how med.rep. work ? Have sympathy on them. All of us are vending and selling something or the other. The ways of selling differ. Take it easy. Will you like being made fun of ?