I'm very interested and involved in athletics. I played college sports and know a lot about recruitment. No one responded to this point that I made earlier, but it is a real and legitimate threat, especially in baseball and basketball. Kids who are star recruits will then be able to leave school to "homeschool" which will really just mean focus on their sport most of the day. With little to no testing, this is doing a HUGE disservice to those kids and sets up a hugely predatory opportunity.
* There is a great deal of pressure, competition, and status surrounding positions on sports teams. If homeschoolers became star athletes (which is not unlikely since they have more flexible schedules which allow more time for rest and practice than students attending conventional schools), they might generate a backlash against homeschooling, with people feeling that it wasn't fair for homeschoolers to get to do the fun parts of school and receive the glory without (as they see it) having to do all the school work.
An example of backlash comes from Arizona, where a 1999 law allows homeschoolers to play public school sports. A homeschooler in Arizona observed that the response to this law has created a "public relations nightmare" for homeschoolers. The Tucson Weekly, carried an article on November 11, 1999, titled "Home-Schooled Kids Shouldn't Be Playing High-School Athletics." Author Tom Danehy wrote, "This law, if unchanged, will mean the end of high-school sports. . . Pretty soon the kids who stay home all day (and work on their games?) are nudging out the kids who have to go to school all day and do mundane things, like show up to class and learn."