Unreliable websites...

...are everywhere on the Internet. If you're planning on using information you've found online in one of your assignments then you need to be very careful. Often the best thing to do is to only use information from academic (.ac.uk) or government (.gov.uk) sites as they are likely to be more reliable. Of course, this isn't always possible and there are lots of other factors to consider, too (e.g. is the website up-to-date?). So what do you do?
I would suggest the first thing to do is get clued up about evaluating websites. There is advice about this in the Evaluating Information section of UEL's Info Skills site. I would also recommend exploring an excellent online tutorial called the Internet Detective. If you're still not sure whether or not a website is reliable, then don't use the information in your assignment. It's as simple as that!