Honestly incredible this level of misinformation is getting posted on HN: https://www.google.com/search?channel=fs&q=are+eula+legally+...

Caveat: this is not universal and depends on the juridiction.

For example in France a software/service editor can only really attack a user if he is infringing on copyrighted stuff. Outside of that the EULAs only allow it to ban/remove access to its services without risk of legal retaliation. And by infringing copyright I mean redistribution of copyrighted material, not downloading and using it. I am sure this is the case in many other countries.