I low key think you can tell through the phone when there's a ham. (Source, me being a guest relations bitch, bonus for retention)  Typically "Yuh whut" answers the call and there's a weird amount of animosity when I'm very polite & enunciate clearly. The more I can't exactly hear them "using their words" the angrier they become.  How hard is it to clearly state your needs in "grown up" words?