最新的arxiv挂了一篇论文对比了中国的新浪微博和国外的twitter,通过研究发现：中国的新浪微博中有些虚假用户不间断的推送、转发一些信息，这些少数的虚假用户会影响信息的发展趋势。这不是正好验证了前段时间的几个大V用户！

There has been a tremendous rise in the growth of online social networks all over the world in recent years. It has
facilitated users to generate a large amount of real-time content
at an incessant rate, all competing with each other to attract
enough attention and become popular trends. While Western
online social networks such as Twitter have been well studied,
the popular Chinese microblogging network SinaWeibo has had
relatively lower exposure. In this paper, we analyze in detail
the temporal aspect of trends and trend-setters in Sina Weibo,
contrasting it with earlier observations in Twitter. We find that
there is a vast difference in the content shared in China when
compared to a global social network such as Twitter. In China,
the trends are created almost entirely due to the retweets of
media content such as jokes, images and videos, unlike Twitter
where it has been shown that the trends tend to have more
to do with current global events and news stories. We take a
detailed look at the formation, persistence and decay of trends
and examine the key topics that trend in Sina Weibo. One of
our key findings is that retweets are much more common in
Sina Weibo and contribute a lot to creating trends. When we
look closer, we observe that most trends in Sina Weibo are due
to the continuous retweets of a small percentage of fraudulent
accounts. These fake accounts are set up to artificially inflate
certain posts, causing them to shoot up into Sina Weibo’s
trending list, which are in turn displayed as the most popular
topics to users.

论文信息：

title:Dynamics of Trends and Attention in Chinese
Social Media  http://arxiv.org/pdf/1312.0649.pdf