How to get the Yahoo headquarters email address?

Yahoo's headquarters are in Sunnyvale, CA 94089.

Simply Google this and up will come details for each of its departments. Only (and rather curiously for a company which does what Yahoo does) not a single email.

Following the hijacking of my good existing PC system by the Yahoo Search Engine (via AVG 9), the only viable Yahoo email address I can find is for their Small Business Department. If we overwhelm that with emails, maybe Yahoo will come up with a mire transparent and accountable system?

Stephen Jackson