If that is the way they want to enrich the user's experience, I would say no thank you.
With Open Wifi you'd get the normal ads, understandable, not additonals where you would not expect them to pop-up.,
and cannot you reckon on Google to block injected ads?
Well they started to kill the noisy ones now from their browser.
Another topic.
Some intern you would not like to hire for sure:
http://money.cnn.com/2015/07/15/technology/hacker-fireeye-intern/polonus