You still need to use caution like always BUT at 8 miles you should be just fine flying where you are. An airliner on final approach will be above the legal 400 ft limit at 8 miles away anyway.
NO. You need a connection to "log in" but if you did that at home where you had one, there should be no reason why you cant fly. If you logged out and then tried to fly without internet thats a problem If you were logged in already you shouldnt...