[FreedomCalls]

Let’s say I have a house on a river and no fence. So if people go into my yard to fish without permission they’re not trespassing? No, I paid extra for a house with that location, and the right to fish on it is mine.

Can I fish there if you grant me permission to do so? Because it's impossible to connect to a wi-fi without the wi-fi either giving permission when asked or not giving permission and being denied by MAC filtering or password protection.

[Myrddin]

Because it's impossible to connect to a wi-fi without the wi-fi either giving permission when asked or not giving permission and being denied by MAC filtering or password protection.

The Wi-Fi equipment can't "give permission". It is hardware owned by some person or business. You must get permission from the person who owns, controls and pays for that Wi-Fi equipment before using it for your own purposes.