I’ve never run into the Web Guard proxy blacklist before, but hit it tonight during my forum browsing. Trying to read threads on bushcraft (wilderness in Australian and other idioms):
The Web Guard feature has been enabled on your line. Web Guard has restricted your access to this content.
The person on your Wireless account who is designated as the Primary Account Holder can disable this restriction through the account management website.
Turned it off via tmo’s website. We’ll see how long it takes for the setting to clear.
Update: 24hrs later the mobile data feed appears to be uncensored.