I deal with a lot of spam everyday. I have a finely tuned "spam sense" that works somewhat like Spider-Man's spidey sense, only much less useful in heroic situations. ("Duck! Here comes another c1al1s advert...") A corporate website of any form is an attempt to have a conversation with me. If you trigger that spam sense, you seriously damage my opinion of the conversation. Here's two big pointers that should have been learned 5 years ago, but may need to be refreshed from time to time:

Again, both of those points should be obvious, and are very easy to keep in mind. If your company violates them, your marketers and/or web staff (and I know which one I typically bet on being in charge of these decisions) have some 'splainin' to do as to why they hate your customers.