I haven't had an ejection in a high school game since my first season 4 years ago in a girl's JV game. I used the baseball mechanic to signal the ejection while addressing the table as it calmed down the visitor's bench and fans who were screaming for the ejection. After separating the girls I told the offending player to go to her bench, but didn't tell her she was ejected until the table was notified to keep the problem from re-escalating. I was told by the varsity officials that if wanted to do baseball, do it but leave the baseball mechanics outside.
I would probably use the signal again as I think its universally understood and communicates to everyone what happened.