It is good , because it brings discipline in everyone. But for everything there is a limit and thus if it crosses the limit then it is bad. 
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In my opinion, without strictness no one can become perfect.It has been observed that the noise level in the schools are increasing because have told not to beat the child but 1 can see that in the previous school,there wouldn't any heared in the school's as the teachers were very strict. You may heared the proverb,"Spare the rod, spoil the child". So ,according to me, strictness is a key to discipline....