Some negative implications of wikis

There are many negative implications of using wikis in the class room. Firstly, because wikis can be edited by anyone.In some cases, people can edit with ugly grafiti thereby resulting in the loss of many artistic efforts. This can be prevented by only allowing persons on the contact list to edit and not the public.
Secondly, vandalism, whereby persons can destroy wikis especially those of large Companies. As such, the use of buts and java script enhancement can be used to prevent vandalism. In addition, unregistered users need to identify their IP addresses to edit content. Permission to edit should be given to registered users. Thirdly, malware is another negative implication which involves users adding links to sites with malicious codes. Software can  be used to prevent saving and editing to sites listed on the malware blacklist. Finally, edit war, where users repeatedly revert to a page or a version they favour. This can be prevented by locking a page from further editing.