This will only help advertisers. If a large group of users click ads and bounce immediately it will be obvious they are using this service. Send them a fake ad,

This will only help advertisers. If a large group of users click ads and bounce immediately it will be obvious they are using this service. Send them a fake ad, see it they click. If they do, don't count/charge for their clicks anymore. Now Google has effectively found everyone who don't convert with ads, and doesn't target them. This makes normal ads more targeted, increases conversions rates, increases ctrs, and lets Google charge advertiser more.