Opinion Twitter could be liable in the UK for unlawful comments you make in tweets. If that seems unfair or far-fetched, a quick glance southwards at a case in Australia outlines how Twitter could end up on the hook for users' illegal actions.
The crucial point for the firm and others like it in the UK is that there is no way to tell what its liability would be because the law in this area has not yet been tested. It could be read as absolving the company. But, dangerously for Twitter, it could just as easily be read as meaning that it can be sued if users behave unlawfully.