This is especially true for your online presence. Spamming is, generally, not taken lightly by most people, but many businesses including social networking sites like Myspace use it in desperate attempts to make profits. But if you do spam your customers, be prepared! People will notice and, possibly, desert you.
Same goes for the search engines like Google. If you try to spam them in the “illegal” way, they will kick you out of their listings completely. This was confirmed by marketing gurus Stephanie Cota and Andreas Ramos, who wrote the book about Google and answered questions in Mountain View last Thursday during their second book signing event.

So, let's define spamming.
Spamming is overuse of marketing in order to achieve commercial goals. It can also mean trickery. And who likes that?
Definitely, not search engines like Google.
Stephanie and Andreas have given examples of big companies like BMW, who hired webmasters that promised them to get their website to the top listings on Google. The webmasters used meta tags and flooded them with search key words in large quantities and very small font. The website did go up in search results for a few days, but then got black listed by Google and it took a tremendous effort to get Google list them again.
So before you are tempted to spam, think again.
Is it really worth it?