What the heck kind of world do you live in???? Children should be raised to be intelligent in the first place??? Did it occur to you that many are raised well but are around other kids daily? Parents can't constantly control who their kids hang around with outside the home. There are other kids that your perfectly raised child hang around that teach them the bad things about sex and how to be disrespectful and how to use some very raw profanity along with taking drugs.
I'd like to know how the heck can parenting a child's mobile phone cause mental pressure on a child? Texting is not something that went down in history, it's a new fad that kids love to use so they don't have to interact with other humans face to face anymore. In other words, they don't need it and it's ridiculous for you to say that it will harm the child mentally for parenting them in regards to their cell phone. When I was growing up a mild punishment meant that I couldn't watch TV and had to stay in my room. You're talking about reducing texting privileges can harm the child? Please!
You're living in an unrealistic world.
"Just tell them what is, show them and let them know that you trust them"? LOL. Yeah, that only works on TV. Most kids will take advantage the moment they know the parents trust them.