Dustin - this young man had already spoken about God in his remarks.
Beyond that - As a parent, I've been expected to accept legal responsibility for my children's actions while they were on school trips, etc... And when my children reached adult age, they were expected to accept legal responsibility for their own actions. (And that's as it should be).
If schools were really concerned about being sued for proselytizing they could make it abundantly clear to all parents and students involved that any law-suit arising as a result of said speeches would come back on them as individuals. That the school district would haul their butts into court right along with their staff. It's not that hard to do. When my kids went on school trips they had meetings to inform us parents of the rules involved and consequences if the rules were broken (and those rules included what would happen if our kids broke the law or caused the school legal harm) And we were expected to sign papers stating we knew the consequences.
I find it amazing you are defending to me that instead (real quick, students at my school sued for $1) of using scare monetary resources to provide kids a solid educational, that the school devote it's money and efforts, to the point where parents need to contribute even more money to the school district, in frivolous lawsuits (and inevitable failures) in trying to disregard the court's decision of the separation of church and state.
Consider:
"A spokesman for the public school district where a student recently decided to recite the Lord's Prayer instead of give a planned graduation speech has stated that students' rights should not be restricted.
On June 1, Liberty High School valedictorian Roy Costner IV ripped up his pre-approved speech and chose to deliver a speech that included the Lord's Prayer at his graduation ceremony. John Eby, public information specialist for the School District of Pickens County, S.C., told The Christian Post that a student's right to religious expression cannot be restricted.
"We also cannot pre-approve a message from the school – whether delivered by a student or a staff member – that endorses a religion," said Eby.
"However, we also cannot restrict the right of students to express their religious or non-religious beliefs when they are speaking on their own behalf.""
School District Spokesman on Costner's Graduation Speech: We Can't Restrict Students' Rights
I can already see the judge ruling against this "loophole." Ultimately, by disregarding their own policies and set speeches, they are condoning (and obviously knowingly) the right of a student to "randomly" break out into a tirade with no limits. Which could be basically a sermon. Of course, there are limits...
I know for a fact if the topic was "Bradley Manning" and not "God," the mic would have been shut off immediately and no one would have gave two ***** regarding THAT free speech. Or if any other student ran up, took a microphone, and started giving even the most eloquent and enlightening speech, that that mic would not also be cut off, with basically no protest. I'm not blind to this sort of hypocrisy... I saw it first hand in my own high school 3 years (I left for university on the school system's dime because the "education" was so bad.) And I much saw the complete dismissal of any students or families to which God has nothing to do THEIR graduation or being handed a diploma, even though the ceremony is equally theirs.