First, click on the ‘view history’ tab at the top right of the Wikipedia entry you are interested in. You should then be directed to a page that lists all the edits that have occurred on that entry. It looks like this: http://en.wikipedia.org/w/index.php?title=Paul_Bradshaw_(journalist)&action=history
Second, to identify if someone has been deleting unhelpful criticisms of an organisation or person on their Wikipedia entry, you could read through each edit, but with large Wikipedia entries this exercise would be too time-consuming. Instead, look for large redactions.
To do this scan through the red coloured numbers in brackets. Low numbers such as (-700) mean that a reasonable amount of information has been deleted from the Wikipedia entry. Also, the date the Wikipedia entry was edited is located on the left-hand side of the page. Continue reading