Children can be often unexpected in their actions. They are not legal adults nor do they have a mature conscious as teens or older people. There need to be limitations and if the child breaks it, there shall be negative outcomes. Parents need to keep a close eye on what their child is doing or texting.
Oh we can read their text, why not just put a chip in them that allow us to track them at all time, even better attach a recording to that chip and know everything they say. If you are unable to trust your kid then your parenting skills are questionable.