There are no such controls on websites. On the other hand, websites can be updated much more rapidly than can either books or journals, so the information may be more current. One of the most exciting features of The Web is the availability of original documents that have been scanned or typed in and posted in electronic form. As with any other publishing medium, however, unless the provider of documents is extremely careful, mistakes will be introduced in the electronic form of the document. Personal anecdotes versus hard research .
Some personal anecdotes are very compelling.
However, without verification or replication, they are not to be taken with, say, the importance of hard research that is based on many such sources. A personal account of an event should be considered, but it should not by itself be taken as refutation of broader based studies. Avoid propaganda sites. Some sites on the Internet exist primarily to promote a particular point of view, to spread a religion, to support a political party, or to grind a private axe. These sites are usually easy to spot because they announce themselves in many ways, but a few of them are more sophisticated, making it harder to see that they have a stake in what they're promoting.