If you knew without a doubt a stranger were reading your private messages sent and received, would it change the type of conversations you're having?

After all the hoo-ha of the 911 inquest; the fact that laws were changed curbing the sites you can see/respond to; the law regarding needing a registered e-mail account before you can view almost anything online; the end of net neutrality and the fact that trolls, either private or corporate, or governmental/security services seem to be everywhere.
I make the assumption that just about every keystroke is viewed and logged and filed anyway !