Trade hack is back? Also.. I got hacked.

Most of the time they completely avoid your password and force a change. Back in 2010 the big thing would be to IP track players through skype, msn, email, any means necessary, and use that IP to find out the emails of the player. After all that's done they can hack the email using the IP as a means of "I lost my password to my email." Most hackings take days to actually accomplish.

Which is entirely irrelevant to the situation at hand as, clearly, no one has had any problems getting back into their own accounts.

That means no passwords were changed!

Also, at least one instance in the resent hackings involve an email address that no one, not even the 'owner', could access.

Are you sure about that? Im pretty sure I was using the same password for nearly 6 months, until I manually changed it yesterday due to the hacking scare.
But if there actually was a database leak, changing your info would be the best thing to do because, the leaked information would only contain your info at the time it was leaked. Unless of course, they breached neon's servers multiple times, in which case, we're screwed.

It's not compulsory; it's suggested.
All you have to do is click a big 'x'.