[ilyazhito]

That was not an option on the NFHS questionnaire for football rules changes. The question was about adding an AFD to personal fouls, so I answered "yes" on that one. I also answered "yes" on the question about adding an AFD to DPI. If there was a question on adding an AFD to USC fouls, I would have answered "yes" to that as well.

The automatic first down provision can also bail out an offensive team that is behind schedule (e.g. 3rd and 20 for A from the A45, 15 yard DPI would ordinarily produce A 3/5 from the B40, but with an AFD, as in NCAA, the situation would be A 1/10 from the B40), so the defense would be encouraged not to foul in long-distance situations, in addition to the situations previously mentioned. Unsportsmanlike Conduct by B (except for fouls enforced between series) should also be an automatic first down, to deter unsportsmanlike action regardless of the down or distance.

Personally, I would agree with the automatic first down inside the 30 rule, or the 1st down on coach's option rule, but those would be more complicated to administer than the "all personal fouls are 15 plus Automatic First Down" rule that exists in the NCAA/NFL. This is why if the personal foul, unsportsmanlike conduct, and DPI enforcements are changed, it would be more likely that these fouls become 15 and automatic first down, rather than the options that you suggest. Ease of administration is the reason why high school football has not adopted the 10-second runoff rule, a rule that also depends on the offended coach's option, even in states that use NCAA rules for high school football.