Haven't seen an actual field goal since back in 04 or 05 when a boy from i believe Throckmorton kicked it. I did see a drop kick in a JV game between i believe Paducah and Mclean back around the same time. Only one I've ever seen go in.
I think the call was trash in my opinion. The kid literally raised his hand for 2 seconds. I can see it being called if it was one that was applied to an extra point or kickoff but taking away a teams title for it is just not fair.
I've had that called many times. A lot of officials (if unexperienced) let it go so often that the rule gets overlooked but yes it is. Its considered a Special Teams play so you cannot block below the waist.