As for emails, dude you can create a ton of emails, not really something they can trace to you if you actually tried to.
I strongly disagree. While disposable emails are certainly a way to get rid of having your real personal info sold everywhere around, a 3-letter agency would easily find out which emails are yours and which aren't. Emails are not anonymous at all, and I am more than sure that NSA or CIA do have access to most, if not all email server backends.