Yes, we do use them. However, they are only used to manage the session of the current user.
Following only the best practices in web development today, connections are only accessible over SSL (https://www.ipixels.com/).
Your email is never visible (publicly) and is only used to log in or sign up.
A poorly created password can lead to your account being compromised (hacked). Try to use a strong password (by including a combination of upper and lower case letters, numbers, and symbols).
Keeping your account safe
Use a strong password to keep your account safe. Avoid using public networks if possible (or remember to log out if you are).