Oh yeah, definitely don't trust them for anything sensitive at all. From their old FAQ:
> Q: So if the government issued a subpeona to Mailinator to divulge emails or logs, you'd rat me out?
> A: Holy crap, yes. I'm not going to jail for you, I have a boyish face and very (very) supple skin.
> At this point, Mailinator cooperates with law enforcement when reasonable to do so and at this point has received friendly subpeonas, emails, or calls from the FBI, IRS, Justice department, LAPD, and Scotland Yard.
> Q: So if the government issued a subpeona to Mailinator to divulge emails or logs, you'd rat me out?
> A: Holy crap, yes. I'm not going to jail for you, I have a boyish face and very (very) supple skin.
> At this point, Mailinator cooperates with law enforcement when reasonable to do so and at this point has received friendly subpeonas, emails, or calls from the FBI, IRS, Justice department, LAPD, and Scotland Yard.