Man with accent and bad connection (fuzzy and had to turn the volume way up) wanted to provide information to a specific employee but denied introducing his company.  Transferred him to Purchasing, anyway.

Man with heavy accent asked for someone who hasn't worked here in 3 years.  I asked what he needed to speak to that person about and he hung up on me.

Foreign accent asked for a former employee. When I said that person no longer worked here, he rattled off three other former employee names from 5+ years ago. Then hung up on me.

Man with an accent (possibly Indian) has called about 7 or 8 times over the past week asking for HR directors.  Will not leave assistants any information regarding the nature of his call, will not leave call back number, and rude to receptionists.

Calls over and over again, 4 or more times per day and never leaves a voicemail.