"I am curious, everyone who says they did not do this refers to the fact that they used no active electronic means to accomplish their goals. But does this "intentional block or disrupt" only apply if someone uses active electronic means to block access to other WiFi networks."
That's exactly the point. Jammers are illegal (the Marriot case amounted to a jammer), but shunts (which are passive and simply redirect radio waves away from an area) are NOT. That's why it's legal to build a Faraday cage.