topr8 - 12:59 pm on Oct 9, 2012 (gmt 0)

>>They do a scan for advertising purposes not keep your information.

who knows what they (and others eg hotmail/yahoo) keep, and how in the future that data may advertently or inadvertently become available to various interested parties.

>>The only sensitive details I could think of that would be worrisome might be something illicit like child porn or terrorist related.

really, how about if you were discussing a medical condition and then one day you can't get life insurance because of it.
or discussing your financial difficulties and then all of a sudden you can't get a bank loan.
how about sensitive, specific information about your business and a competitor gets hold of it.

i'm not for one minute suggesting that this happens now, but if the content of emails is somehow collected, who knows how this data may become available in the future.