Change your passwords, that is the best thing you can do. Personally I would love to see some additional security features such as 2fa implemented somehow. There should be enough funds for forum development to introduce this right?
I think that 2fa will be implemented in the new forum, but I can't be too sure on that. Anyways, this is most definitely in connection to the data breach, does this warrant a negative trust from DT members seeing as those account are hacked?