Balk or not?

[fguyton]

This pitcher pitches for my son's team, so I've seen him pitch a lot. In all cases except this one he has thrown to 2nd (or where ever the runner is). I also know that this is his first season pitching with runners leading off. I'm pretty sure this was not a planned event but rather instinct... or maybe panic ;-)

One of the reasons I threw this question into play is because I can't believe that at some point someone hasn't or isn't going to do this as a planned move when runners are getting large leads. They could have F4 and F6 ignore R1 so as to temp R1 to take off... F1 simply steps and throws to F5 and R1 is hung up. Legal? Seems so under FED.