Seeing the cisco question thread reminded me of the first technically incompetent salesperson I worked with.

Our router consultants put together a project overview for a customer who needed new infrastructure hardware. They read off the list of equipment to the salesperson. The salesperson put together the proposal without having the engineer review it. (Duh!)

The salesperson presented the proposal to the customer, with a complete hardware list that called for Sysco routers. Don't recognize that name?

Sysco Corporation

Needless to say, that company never did call our salesperson back. Ever.