Or just ban this kind of data collection. Is there any reason anyone would willingly click "Accept" when a website asks to share your data with 500+ partner sites?
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If the data is being sold, it should be legally required to word it in that way. If there's even the slightest possibility of your data being leaked to spammers, it should be worded to reflect that.
"Do you consent to us selling your data to any party that wishes to buy your data? Do you consent to the possibility that your data will be used to spam you or steal your identity in the future? Yes/No"
> Hey, please send the shipment to my customer. No, I can't tell you the address, it's personal data.
Some data sharing will always be necessary. What needs to be banned is the unnecessary sharing, but it's hard to 100% define what counts as necessary