No, special pleading is when you have to resort to cloaking devices to explain why they can not be observed with modest magnification. In order for stratelites to be viable there are a few things that first have to be proven.
1: That they can hold position while still in the atmosphere in a manner similar to the fixed positions of the proposed satellites.
2: That they carry RF equipment capable of duplicating the signals observed from satellites
3: A method of concealment that is demonstrable.
By the way, why dont you look up special pleading to see what it actually is, and drop the insulting attitude.