mangago got blocked on my school wifi for pornography lmao

i typed in the URL to read gachiakuta and lo and behold, the site was blocked, the reason: pornography. My heart literally skipped a beat and i closed the tab omg this is so embarrassing. How do they even know that?? I was using this site on my school wifi with no issues until now - and no i didnt read yaoi on my school wifi...