To register, only your username and email are required. We don't request other personal data and we will never share your datas. You can either register with your Facebook, Google, Twitter or Github account (2 click operation) either register with the clasiscal form (username/password/email).
Once registered you can follow your contributions and be credited for the lines you have opened or the lines you cross as first. You can also create your Slackline profile and define your Basecamp (require to be visible on the Members map). The accurency of your Slackline profile is up to you. Most of the fields are optionals.
The User Privacy page explains which data is collected and what we do with them.
The basecamp and the Slackliners map visiblity are optional. Even if you don't want to be visible on the map you can create your account to easily follow your contributions..