[Terr_]

OK then, your website and the ad-networks are now CRIMINALLY LIABLE for any and all malicious code that arrives on my computer through them, so that if some ransomware destroys my files you will pay me to cover damages.

Sound like a good start?

Maybe later we can talk about you compensating me for how any of your badly-behaved ads degrade my service on other sites by burning CPU cycles, using outsize amounts of connections and bandwidth.

.. And that's not even touching the whole confidentiality/privacy aspect.