No subscription was used for conection over the matrix not logging in/accounts they are two difrnet things. The wording is probaly just throwing people off. The whole part where it talks about hacking clearly says you do not have an account stolen or other wise. If you had his account you whould not need to hack in, bucause normaly you only need the access for 1 run.
Not that I understand your post as a whole, but just that part that is relevant for me:
If you have user account, you can hack yourself an admin account.
Now. Lets get over theory, give me example how would you hack the node if you are in Seattle and the node is in Cairo. Consider it R3 device, with all attributes, software and hardware = 3
pg 224 main book talks about it as a conection, basicaly at this point you get public access just general info about the node. No authentication. (aperntly all nodes have this level) You whould most likely only get the nodes Adress ID, and the abilty to fill out forms for access and maybe the name of it from a secure node. That whould make public access the log in screen on a E-mail site, server.
again...IDN exactly what you are talking about, but I can assure you, that any of my hacker/rigger characters dont have anything like public account or public acess rights on his commlink/ drones. And I dont expect any high profile target...i.e. corporate nexus, would have one.
Physical counter measures have nothing to do with the matrix they are for physical threats, the hacker only needs a ground team to get the data if something is stand alone or local access only. Witch most labs and research centers whould be.
Now this is exactly the reason why wifi inhibiting materials were invented...to stop physical threats.
Nope.
It only takes a few hundreds of litres of WiFi inhibiting paint and whole facility is effectively cut of from outside world, and the only way how to get in is to get in physicaly, or have i.e. Satelite uplink linked by long optical line to drone that is inside the facility and works as a retrans station (or physical tap...like Micro tapper bug). More on this topic pls. read in Unwired, p. 55 (Networks), p. 129 (intro on Techniomancers), and SRA, p. 264: WiFi Negation