you see a lot of lame behavior, agreed
the good umpires let it go once or twice....then you see a lot of "she offered" or a generous strike zone to put a stop to it
DD has a girl on her HS team that try to left slapper mostly unsuccessfully. .... It is painful to watch. And when she is on the left side she tries to drag bunt with only her left hand. Never works either.
I don't see it as any different than fake bunting on 3-0. Especially if they move their bat around while the pitcher is in her motion.
We saw the opposite happen quite a bit at 12u. Girls learning to slap start left, get 2 on em, then switch back to right.
Haven't seen it like you described in high school - but I guess the batter could dance a jig if they felt like it, just need P to do their job. It's high school - keep the expectations low and you'll never be disappointed.