If you create an area in Data Management -> Areas with a name that contains the ' character, like "I don't know", it will later break the user edition page (Data Management -> Users. It will be empty and show this error in the browser console:

Uncaught SyntaxError: missing ] after element list

The reason is that, at some point, we generate a piece of JS code with a list of areas like this:

data : [
    [2, 'Web'],[3, 'Systems'],[4, 'Management'],[5, 'I don't know'],]

Where we use ' to enclose strings, and we don't do any escaping of the string so we are generating incorrect JavaScript.