I seriously doubt they don't see them, but the polices for handling them are probably limited for the general GMs. GM's likely can report them when they see them just like everyone else, but once things are sent to the STF there's likely policies in place that they have to follow that they don't disclose because you obviously don't want botters to know what precautions and tools are being used to sniff them out.

Anything that affects their bottom line will be cause for attention, but if you're trying to address an issue like this you can't tell folks what you're doing and be effective.