The potential for abuse is just to high.
Originally I was so what some random stranger at some big department might have some info on me.
A friend said to me once "think of your worst enemy, whoever that may be, if they had every piece of communication you ever sent on the internet or if they had list of every website you ever went to, would you be worried?"
That clarified things for me. Not that I have enemies in that respect (at least I hope not) but if I did would I want them to have access to this information.
We do not know who has access to this info and business leaders (especially in countries other than the US) are having their conversations monitored and that info is apparently being passed to business leaders in the US.
We can't have this.