Technically, if you do see SPAM in the WA Community you are advised to click the "Report Spam" button.
(Just for example!)
Unless it is serious and egregiously repetitive, my preference is to contact the person who has pasted the link(s) and suggest they remove it ASAP.
For example, I came across this situation just several days ago. I sent a friendly email with the link to Kyle's "Spam is a No-No!" page, and within minutes this member had removed the links from their blog. Fast and Effective!
Ultimately you don't want to risk Spamming the community, it can lead to loss of writing privileges and won't do your member rank any good.
Thanks for reading, hope this has helped clarify the issue of Spamming in the Community. Please feel free to leave me a question or comment below and I will get back to you.
All the best!
Thomas :)