If only personalised ads were actually any use.
I have a fairly low tolerance for:
Being told I can buy what I have ALREADY BLOODY WELL BOUGHT.
Being told about places to buy stuff which I ALREADY BLOODY KNOW ABOUT
Being told what other people are buying AS IF I GIVE A RATS ARSE
Being told what is "trending" as if that was somehow important
Being told what else people bought, after buying something I've just bought as if it was somehow relevant to me
Being offered something a bit like* what I've just looked at in the hope it will stir any interest on me
And people† wonder why folk use AdBlock
* but only in the coke addled brain of some hapless marketing droid
† Yes, I know it is stretching the definition of "people" to expect it to accommodate anyone in Internet marketing but it's easier to type than "fuckwitted addlebrained retard oxygen thieves who are a great argument for abortion to be legal up to at least the 369th month."