Ackbar’s right, you know…
If you can set your computer up such that it can have no connectivity (such as an alternate hardware profile or a radios switch) as a bootup choice, do so and label that position “Working.” Keeps you off the Interwebs when you’re trying to get work done.
My laptop has a radio switch. I love that switch. If it ever breaks, though, I’ll be hosed.
My old computer had a hardware profile that didn’t connect to the network card, so when I booted up and chose “Video work” it was impossible to connect to anything via the network card.
As General Ackbar says, “It’s a trick!” but I accept it as one of those tricks we do, such as setting the car clock ahead ten minutes.
In retrospect: Yes, I know, It’s a trap. In my defense, I had been up late for many nights in a row. Also, in retrospect, this may not work if your software and reference tools have to touch the Internet.