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Twitter: Dave Gorman on tweeting rules and manners

Comedian and top 'tweeter' Dave Gorman said there were few rules on the Twitter social network as he debated online manners with Andrew Neil.

Alastair Campbell said he did not block or un-follow those online who were rude to him on Twitter where, he said, people were generally kinder than on blogs.

While Michael Portillo said he did not want to be a "sad man" like the This Week host who was obsessed and cannot stop checking his tweets.

This Week posts a hashtag about its sofa guests each week, and Mr Portillo is often labelled #sadmanonatrain

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