Any GM in the online campaigns forum can inject any CSS class in the website to his board. Some of the changes can really break usability, and some of the class ids are so common words that they come once and again without the GM knowing what is going on.
You can basically use in the campaign title the id of any CSS class in the paizo.com website style sheet and it will be applied to your entire campaign.
I made this example with 'red' and 'form-prompt' a while back.
Someone posted their campaign getting red recently and felt frustrated/confused.