I agree with Tater. A big fat NO!
I say this from raising children and being one too.
If you are worried about some dangerous behavior, take them to a therapist. They have to report it.
Most important, you need to establish trust. They should feel comfortable talking to parents. If they find out you have read private writings, you ruin all that and may never get it back. It also can set up a life long feeling of distrust, from my view.
As a parent, we may not realize things have changed , our children are growing up. We need to learn new ways of parenting.
All the best to you Data
eva