Question

Did you understand my thesis because I meant that families and not the communities should impose curfews because it is more flexible ( freedom or not)?

Answer 1

How to write an introduction:
http://leo.stcloudstate.edu/acadwrite/intro.html
and
http://grammar.ccc.commnet.edu/grammar/intros.htm

How to write a thesis statement:
http://leo.stcloudstate.edu/acadwrite/thesistatement.html

Now let's take a look at your most recent intro:
<i>High school students are known for their "out of control behavior". <b><~~This is a vast generalization. =( You are saying that all high school students are out of control?</b>
Communities are considering to adopt curfews for high school students.<b><~~Many towns and cities in this country already have curfews; they don't have to consider.</b>
On the contrary, others think that it is up to the family and that not having curfews can possibly be a good thing. <b><~~This sentence doesn't make good sense. Also "can" and "possibly" mean the same thing; cut out redundancy.</b>
Although it is important to restrict high school students, the communities should leave it up to the family. <b><~~Is this your thesis statement?</b>
Hence, communities should not impose curfews on high school students. <b><~~If this is not your thesis statement, then delete it.

</b></i>