I have a problem with you allowing Advertisers to put a square icon on the left side of the email headline on the inbox view. It is too hard to differentitate an ad from a true email and has, on more than one occasion, caused me to click on a link that took me to a dangerous site. Thank goodness, Avast prevented the connection, but if I ever get a virus or a trojan horse from clicking on an ad when I think I'm clicking on an email, you'll hear from my lawyers.
IDEA: Prevent advertisers from deceiving us by prohibiting anything that makes an ad look like an email.