Spam URL Classification useless?

This regards the " Spam URL" Classification under " Fortiguard Web Filtering" . I was wondering if anyone else felt the Spam URL classification has been applied to liberally to too many websites. For example budget.com, the rental car company, fell into this one. While having this on sounded like a good idea at first, I quickly had to turn it off due to frequent blocking of sites my personnel need. I' ll send the occasional correction in to Fortinet, but I' m not going to turn it into a full time job.