I've been on this forum for almost 5 years and others are much more longer but never got a problem on that thing (secret question) or wasn't even hacked. It's not the site, it's the user.
Looks like you've never used the secret question to recover your password, otherwise you'd know that if you use the secret question to recover your password, your account will be locked and you'll have to contact the account recovery team. You can read about it here.
PSA: ACCOUNTS WILL BE LOCKED IF THE SECRET QUESTION IS USED TO RECOVER IT