yes, a very sober and restrained witness is the best. However, courtrooms and judges have seen many very upset people vent over the years, and judges that take their job seriously will recognize that we ALL vent when the conditions are right. Put yourself where these students were, and understand why they vent. And the students in many cases should put themselves where their parent/guardians were, and understand how a loving parent or guardian could send you away. A child wrecking a family is not a good thing either, and "growing up" is not a valid excuse in most cases.Sure as hell not if the family doesn't survive the child's "growing up".
A person who vents here at Fornits will not necessarily vent on the stand, the attorney or their staff would see that the person is suitable for testifying, or not. For example, RB vents at times, and at other times is a very sober individual. I think he would be able to testify just fine.
There is still a lot of anger in many students, and a lot of anguish in parents. Anger is more likely to lead to venting. Let it be, but mediate it if you can.
Anger and venting helped close down Love's Canal, and countless other pollution issues. It may help here, if not out of control. It makes the anger and anguish clear to a reader - or a judge.