Facebook can easily serve 'semi-unique' ads, they already personalise them. But that just leads to fuzzy matching of ads. And unless facebook start disguising

Facebook can easily serve 'semi-unique' ads, they already personalise them. But that just leads to fuzzy matching of ads. And unless facebook start disguising their ads as actual content (which would get them in huge trouble with the FTC), adblock can always work out what's an ad because it's somehow marked as an ad.