otherwise no one can learn from on-line feedbacks!
Well, I tend to think this way now. Online collaboration is the modern paradigm. However, I understand Waqas' concern!
If Waqas Idrees is your real name, then your essay will appear here next to it with the date you posted it, so that should put your mind at ease. Also, express your unique plans and ideas in the essay -- so that it is as unique as you are. A good essay expressed a detailed plan, and a detailed plan is particular to you.
Aside from these ideas, the truth is that you can't be sure no one will copy parts of your essay if you let people see it. So... it is what it is.
See the TOS for other useful info.