I've been doing a lot of edit reviewing lately and I seem to be the only one actually taking the time to analyze everything before accepting / rejecting an edit. But that's for some other discussion.
While doing just that, I stumbled upon this edit to an answer. The original answer mentions the acronym of a product name. The editor edited in the full name of the product and included a link to the product. Checking the editor's profile revealed that he works for the company that makes said product (if it's not clear enough, check out the first blog post on his linked site).
Now there's a kind of unwritten rule on Stack Overflow that stipulates that you should mention you work for a company when referring to one of it's products in an answer. Then again, that's not an answer.
In my opinion, this edit is okay, but I'd like to know what others thing about it.