When I was in school I found that the content blocking only monitored the actual page you were visiting, so if you wanted to go to albinoblacksheep.com or whatever, you just wrote an HTML page with an iframe inside and it would work fine.

Memories...

When I was in school Internet wasn't a thing yet.

However, me and some friends "hacked" the program that blocked virtually everything interesting unless you had the password on our school computers. The first thing we did was boot up in DOS. There we found the secret password file for the blocking program. Alas, when we tried the password it didn't work. It must be encrypted! So we went back into DOS and renamed the password file. When we booted up Windows again the program thought it was running for the very first time and asked us to enter a password. We entered "AAAAAA" and exited into DOS again. The new password file now contained the "encrypted" password: "GGGGGG". Hmm, there's a pattern here... We then restored the old password file and "decrypted" the original password. From that point on we had full access to any system! Those were the days!

That's incredibly witty. Props to you.

My sister thought it was cool idea to put password on bios, I found out mother board has battery on it.

Same here but I found the password reset jumper. Good old days!

For kids like that we suggest segmenting them into their own router. They can still install a VPN, unless you use our Android app (which is a VPN itself, and you can't have two active in Android at once)

If you were already booted to Linux, why tamper with the Windows partition at all? You might just as well have accessed the 'net with Linux.

If the software was blocking at a lower level on the network stack and not just in the browser, then the answer is probably multiplayer games. Presumably OP wasn't doing this just last year, but in the late 90s and early 2000s when Linux gaming wasn't a real thing yet.

Correct. It still isn't tbh.