I agree, it sounds to me like scammers/salespeople are being sent there, who have nothing to do with the work. I used to work at a library and we'd get the toner scam. They'd ask for the person responsible for toner purchases. That is done from a central office, not a branch library, and any sales person we had a relationship with would know that. There's no way that one of my duties is to deal with them. It wouldn't hurt my job if I did the voicemail thing, although it wouldn't have been possible for me.