Sounds like it's time for the semi-annual reminder that the FHSAA is somewhat hand-tied when it comes to the transfer issue. The state legislature essentially opened up that door (or portal, if you will) a few years back. If you believe high school transfers are a problem, let your representative know.
Where the FHSAA can get involved is by prohibiting recruiting, which it does, and by enforcing the rules, which it does, but for the most part, only if someone reports a violation.