My friend said he wants to grab our teachers butt and said then he will threaten to tell people she tried to molest him if she talks?
nice 100% real story bud. the teacher would just take him to the principals office or whatever on the spot, nobody's gonna believe the 9-year old.
And you, presumably, will not tell anyone that he told you about the plan, but you would let the teacher be blackmailed or fired? Your friend sounds like the kind of person that the administrators won't believe.
your friend is wrong, nnaybe you should nnake sonne new friends that arent into that