I came from an event where there was AC power strung out on the field for telescope drives, cameras and laptops plus a WiFi network. This WiFi served a week long event and the equipment was donated for that event free of charge. The DSL that served this was a 3 meg one and there was a limit of the allowable sites. Hulu, YouTube, Vimeo and other high bandwidth sites were locked out. This lock out list was provided by the equipment donor plus some added sites from the the WiFi team present there. They even blocked out a couple of ISP's from using the system, they were caught uploading and downloading large files.
Susan's was blocked out and I got a nastygram splash for the reason as being pornographic. I got on Susan's last year on their own intermittent network gear though.
Joelene
If they use web filtering software which also tracks sites based on their meta tags (the keywords coded into the site that tell search engines what searches should list it) then there's a possibility it would be blocked if the filtering software uses 'sex' among it's criteria, since Susan's contains that word within the meta tags.