Is this still relevant today then?
Not everything can be written down, that's why it has been left to SAPD members to determine "high gang activity", which seems fine to me. Personally I rarely pull Ghosthawks, I prefer to drive around in hatchbacks, a lot of other SAPD members are the same.
Going to be honest, I can't remember the last time I saw more than a few Hunters at most pulled for a Fed. A couple months ago sure, they were definitely a problem then, but since the SAPD has cut down on the Hunter usage at Feds.