How do you delete users from your website?

Heartbleed has got me rotating passwords and deleting stale accounts.

I've found a lot of websites, despite what they say, don't actually delete your account.

For example, Eventbrite appends "deleted-" to your e-mail address and leaves everything exactly the same. You can even log back in!

Deleting accounts and user data is always a frustration. SQL foreign keys being one pain I'm sure many have suffered. On my last project, we just had a "deleted" column.

How is everyone else handling deleting users from your website?