If someone gains access your account and has done something, You are responsible for your account, and will face all blocks and consequences, unless we can prove your account was compromised using CheckUser.
Tips on keeping your account secure
Have numbers, letters, and symbols in your password.
Make your password long.
Do not make your username your password.
Do not ever give away your password, not even to an administrator. A staff member or administrator will never ask you for your password.
Change your password every few weeks.
Make sure your password is not easy enough to guess.
Do not make your password related something everyone knows about you. For example, sing something like your favorite sport as your password is not recommended.
Don't worry about forgetting your password. As long as you have confirmed your email address, you can always reset your password.