Social media summary #6 acquired by Facebook, watchdogs ask to not advertise to children, what happens to inappropriate content on Facebook, Pinterest copyright websites and Twitter crashes! Here is last week's social top stories.

Monday: Facebook buys

Tagging friends on Facebook is one of the features that helped make the social networking site popular. In fact, getting a message saying you have been tagged in a photo from your night out at the weekend is one of the more fun notifications you can receive.

It was confirmed on Monday that Facebook acquired Israeli startups for an undisclosed fee. This is a good buy for the social network as Face's face recognition software is a powerful tool. And who knows, may soon redirect you to the Facebook.

Tuesday: Watchdogs don't want Facebook to advertise to pre-teens

With news that Facebook may be getting rid of its age restriction, many watchdog groups are urging the company to make sure the younger sign ups will not be bombarded with advertising.

[Image from Mashable]

The letter asks that 'likes' are "not then be used to target that child with ads, nor should it be used to conduct social media marketing, in order to convince the child's friends to also interact with the product or company."

Facebook politely replied and it looks like they may pay attention.

"Enforcing age restrictions on the Internet is a difficult issue, especially when many reports have shown parents want their children to access online content and services. We welcome today's recommendations by consumer, privacy, health and child groups as we continue our dialogue with stakeholders, regulators and other policy makers about how best to help parents keep their kids safe in an evolving online environment."

Wednesday: What happens when you report content on Facebook

Everyone has that friend that posts inappropriate pictures or statuses on Facebook but what happens when you report their content? Well, thanks to this image you can now see what happens to people's posts when they get reported. Have a look.

Thursday: Pinterest instant copyright

Pinterest's huge rise in popularity is not the only thing that makes the social pin-board interesting as legal issues have always seemed to be close by. Since May however, the company started adding citations for content pinned from certain sources, including YouTube, Flickr and Vimeo.

Now it is reported that Pinterest will add five more sites to the auto-citation with 500px, Etsy, Kickstarter, Slideshare and SoundCloud. Maybe Pinterest isn't a law suit mine field.

Friday: Twitter crash. Was it hackers?

If you like to tweet on a regular basis you may have noticed on Friday that the site was down for a while. In fact, it has been reported that the crash was the longest Twitter's fail whale was needed in 8 months.

The interesting fact is that hackers are trying to take credit for the crash while Twitter are saying it was just a bug. So who was it? Did Twitter really get #tango'd or are UGNazi just trying to get some publicity?