We had a couple of reports of people's signatures getting edited etc. in a bad way. You can rest assured this wasn't done by staff and nobody has compromised any of our databases.
However, remember to keep your passwords secure. If you use similar passwords to elsewhere which has been accessed, people and even bots may be able to access your account.
We always recommend using unique passwords, and two-factor authentication if you are able. Make sure you're as secure as possible