While it's certainly possible to hack an account on-the-fly, the truth is that most of this can be attributed to weak, common or obvious passwords...clicking links in emails before verifying they're legitimate...replying to illegitimate emails...willingly providing account info to unauthorized sources...etc.
In other words, carelessness on the user's part.
Kendrick, wasn't your email/Gmail hacked back in April? I recall getting some spam from your account. I sincerely hope you weren't hit again, but I imagine you learned your lesson the first time and changed your password to something very tough to crack, and stopped clicking unknown links.