Before you sign up to try it - there's no way to remove your account or indicate you don't want email from HipStat during the sign up process or after you've joined.
Note that emails sent to Mailinator are public.
Pretty sure cleaning up after thrown eggs is significantly more work, and more public than hitting the spam button
There has been a subtle pr campaign to convince people you should press "unsubscribe" on any unwanted mail instead of hitting SPAM, lest you ruin it for everybody. I'm saying: don't believe the hype. In this case, just press SPAM.