Call center - Donor Privacy Protection Line:  they continuously call and hang-up so I do not know who they claim to represent but upon calling the number, you can only leave a message to be removed from their list or listen to a long list of various charities that they claim to represent.  You are supposed to leave your number and the charity that they called about but since the idiots always hang-up, you can't say who they are calling about.  Too bad, as this turns people off to legitimate charities but if you employ scumbags, I guess you get what you pay for.

Got them to stay on the line for nearly two minutes today talking to the receiver laying face down on my desk before I had to disconnect them to answer another call.