Software for blocking RTA-labeled sites

[Agent]

Thanks. One thing I'm surprised by is that Apple's parental controls don't seem to scan for it. I don't know if its the mod_headers method I'm testing that it's not recognizing or if it just doesn't recognize RTA, period. I've been playing with it all weekend. RTA is a nice, simple way of blocking content but it doesn't seem to be widely supported yet by the big filters.