[AtlUmpSteve]

To the OP request for both NFHS and ASA rulings:

In ASA, I have nothing but a stupid play by F2; and if taught to keep the runner on 1st, an equally stupid coach. It does not meet the ASA definition of making a play, and should be treated as an errant throw, with results whatever happens.

In NFHS, we have a specific ruling (for whatever reason) from the Rules Editor (who has the authority to speak for the Rules Committee) that this is a play; the fact that we don't consider it a legitimate play, isn't material anymore, the ruling is there. Unless you judge this was not a quality throw that could have been caught by the defender at first, or simply a blatent attempt to hit the runner (USC), you must rule this INT in NFHS.

Not because I say so, or even believe so; because Mary Struckhoff says so.