We post here frequently tips on proper Twitter etiquette, only because it seems accounts of both big and small users continue to run afoul of the terms of service and find themselves suspended.

For the third time this year, scammers are found to be preying on Ikea’s Facebook fan base. The latest ruse involves the promise of a $1,000 gift card for those who sign up to Ikea’s Facebook fan page.

A few weeks ago, the social media chatter around Nestlé was, not surprisingly, all about chocolate and Nespresso. Today, it’s Greenpeace, rainforests and orangutans. Mike Schwede at Orange8 neatly illustrates here the shift in sentiment against Nestlé since Greenpeace started its Kit Kat pressure campaign a week ago.

Then you may want to check out this presentation from Toby Beresford from London-based Nudge Social Media.

That’s what we’re pondering this morning after the New York Times swept in to confirm an old-ish story circulating online that Apple CEO Steve Jobs has been answering occasional customer queries on the sly. Ironically, Jobs didn’t respond to a NYT email asking him to comment on his commenting.

Great work by Scott Douglas, who puts together this presentation on what could be the most successful social media pressure campaign yet: Greenpeace’s hijacking in recent days of Nestlé’s Facebook page on the way to getting the confectioner to drop its ties to an Indonesian palm oil supplier.

A year ago, those charmers at Ryanair dismissed all bloggers as “lunatics” and “idiots” after getting caught in a row with one blogger over a booking glitch on the airline’s site. Fast-forward a year and the low-fares flyer tells New Media Age it’s rethinking all this fuss about social media and that it will now be taking its first steps in social media engagement. Very limited first steps, that is.

That’s the latest warning from Twitter spelling out in more detail what it considers to be unacceptable behavior in its effort to rid the micro-blogging platform of spam. This includes aggressively following and unfollowing other Twitter accounts. Be forewarned: it is an offense that will get you booted from the network.

Not familiar with the concept of “earned media”? As Arto Joensuu, Nokia’s head of digital marketing MEA, explains in this presentation “earned media” is a new way to look at your marketing investment: getting consumers excited enough about a product that they do all the talking. It’s more effective, he vows, and it should be the objective of all marketers.

It may prove to be the most successful social media influence campaign yet: Greenpeace and its supporters invaded Nestlé’s Facebook page last week, posting thousands of attack messages charging that every KitKat candy bar Nestlé makes threatens the habitat of orangutans and other threatened rainforest species.