I agree totally with your comments and think it will be very difficult to monitor and enforce.
That said, I believe part of the impetus was to prevent High School coaches from "forcing / strongly recommending" that their school athletes play on a "high school sponsored team" (potentially coached by a volunteer associated with the high school and wearing the high school uniforms) during the summer travel ball. Reason being is that does two things that are deemed unfair: a) it's like additional practice for the high school team and extending the season by playing travel ball tournaments (in 16U or 18U), and /cool.gif" style="vertical-align:middle" emoid="B)" border="0" alt="cool.gif" /> it put some kids in a situation where they felt they had to play on that team (because their high school teammates all were doing it and their coach expected it) vs. playing on a more competitive travel ball team during the summer. The latter being potentially bad for the athlete----particularly a star athlete that really was better served playing on a "Gold" / "College Exposure" type team that could qualify and go to bigger tournaments-----as opposed to a high school team that's playing 16u/18u ball in local / regional tournament formats. Thus, there's a perception that the high school team has an unfair advantage (more time playing together for the team) AND, on the flip side, those high school that "require that" may put undue pressure on a college-bound athlete to participate on a team that's not going to compete at the level during travel ball that's best for them.
Again, high school coaches aren't supposed to coach after a certain date and there really is no "high school sponsored teams" because they all have to be affiliated/register with USSSA, ASA, USFA, or one of the other governing bodies to play but the reality is there are high school teams competing in these tournaments with a volunteer coach and they simply registered the team through their local city youth athletic association.
I am aware of some specific situations where this was the case, however, I don't have specific knowledge that this is what drove this crazy new rule. I think this rule will probably address those two things above but will unfortunately create strife for a bigger population of athletes--- particular those in non-metro areas that simply want to play competitive ball in local tournaments during the summer.