Passion4baseball,
I have no problem with a high school player doing it, if he knows what he is doing and their are boundaries set.
In terms of college recruiting, it would give him an extra boost of exposure. Many college coaches start with those positions on their recruiting shopping lists.
In terms of playing both ways (SS/SP) in college that would be another matter entirely. I can only think of one player (in 4 years) who played SS/SP when my son was in college. While it was D1, it was not the full 56 games normally played by D1 schools. He was drafted as a junior in 2012 and the MLB team converted him to a pitcher. I think it is a much more likely scenario in college (although still rare) to be a SS and relief pitcher.
JMO.