Vandalas
Vandalas tai kažkas sumažina daugiausia suvokiamą straipsnių kokybę, paprasčiausiai smagumui arba įterpdami visišką nesąmonę aptarime, trindami straipsnius pardavinėdami arba nepagarba labiau veiksmingiems pagalbininkams. Tai sukelia Vikipedijos piktą ciklą, kuriuos šiuos pagalbininkus išvaro.
Dalinis sutapimas su kitomis klasifikacijomis
Trolls may or may not qualify as vandals. Some think they are social vandals. These tend to be the same people that believe that a Wikimedia wiki is a sort of community.
Wiki Spammers are a type of vandal who add unwanted external links to wiki articles in order to promote their websites (or their customer's websites) in search engine rankings. MediaWiki has some Anti-spam Features. In particular, most new MediaWiki installations use the 'rel=nofollow' attribute on all external links, meaning that spamming those wikis is a completely pointless thing to do!