In the search to optimize pages for search engines some sites use techniques described as spamming the search engines. There are a number of things you can do to be considered a search engine spammer and I have seen a few VoIP companies spanked by Google meaning their site no longer shows up on Google – even when you search for the company by name!
I was surprised however to find out that the German division of BMW was recently found guilty by Google of spamming as well. This means that the German language BMW is now dropped from Google! Ouch.
One of the challenges webmasters cite is that they aren’t sure what practices are allowed and aren’t allowed. Search engine spamming is a grey area and if you are the wrong side of the grey, obviously bad things happen.