What do you think is Spam?
No... seriously... we need to give it thought, as I am sure we have different levels of tolerance.
In fact I should ask what do you think is the demarkation between Spam and Not-spammy.
Is there anything like verbal spam?
Is it spammy to post a link to your website while answring someone's question? Or poining back to your site from within the solution you are providing for the question asked?
Think about it...