Don't let children act however they want or do whatever they want, just let them play!
Letting children do anything they want prevents them from developing the important lesson of self constraint for the noble cause.
Not letting them play prevents children from interacting with environment and learning from it, and hopefully when that child grows up he or she will have played enough to start focusing on other things in life.
In todays increasingly liberal society where anything goes it is desirable for children to have learned the ability to do the right thing for long term gain even though it might reduce their short term pleasure, the maturity to know what the right thing is, and the experience of having made the mistakes.
By letting a child do whatever a child want and preventing that child from playing by for example forcing that child to sit at home and learn one will have a grown up person that will keep doing whatever he or she wants regardless of circumstances, trying to catch up on all the play and fun he or she missed out on as a child, with no experience of playing.
It is obvious that learning to play as adult, with adult toys, in liberal society, mistakes one will make and hurt self and others as one inevitably does when playing is much more dangerous than games children play.
