Also the retargeted ads that follow me everywhere now. MOST of them are for companies where I have ALREADY bought something, so they are wasting their ad spend on chasing an existing customer, not a likely prospect.
This has made me resolve to try and make the web a less shitty place, one web site at a time - and I have ensured that my web projects absolutely DO NOT have any popups or cross site tracking in there (aside from normal analytics that is only used in house).
[I accidentally mis-typed 'pop up' above but LOVE the Freudian slip so will leave it as-is].