If you are *that* worried about your email address, like its somehow secure or something, well I hate to break this to you, but it really isn't.
Sure, CBT got hacked, but I'm betting EVERY single one you get at least ONE spam message per day, and if you get ONE, your email address is no longer "private". The *passwords* are the bad thing that got hacked, as many people use the same one on multiple sites, but just emails? Nobody can do anything with that except spam you.
If you are *that* worried about it, go create a free yahoo, gmail, hotmail, whatever account and just check it once a month for new emails. Or you can be smart and get a whole domain, then put email addresses like "some_domain_I_gave_my_email.myrealemail@mydomain.com", this allows very easy filtering, and lets you know who sold your email address.
Without emails there is no way to get in touch with you, and many people don't have accounts on here, and what if THOSE get hacked again?
Having been in the IT and security (both physical and computer) for over 20 years I am pretty sure of what I'm talking about, but if you are really that worried simply don't use the tool, and use more old fashion stuff like posting your phone number in your LGS.... wait, that is far more insecure than an email.... ummm.... I have no idea how you can find people without giving out *something* for them to use, and a CBT.com account is no better than any free email system out there.
"He who sacrifices freedom for security deserves neither." - Benjamin Franklin