I unblock ads on AVForums. And honestly, the ads are either really well targeted (because I’m probably going to buy that amplifier eventually), or random ebay stuff.
If they started serving up the generic “reduce belly fat in 2 seconds with this simple trick” with some AI generated picture, I’d re-evaluate very quicly.
You can block or disrupt communications with LEO.
But you’d need the blessing of the country’s government to pump out that much interference continuously.