Explain the logic behind creation of Revenue Cost elements

Dear all,

We have activated sales order component in Controlling Area through OKKP.

While releasing sales order it is showing error message suggesting create cost element for the revenue GL.

So that we have created revenue element of catagory 11 for that account.

Now we are going to post this transaction to Cost centers.

Is it logical to post revenues to Cost center??

will it lead to some inconsistencies in future??

Pl. suggest suitable measure..

thanks

Ranjeet