In reply to Oliiver: Click on the little question mark next to my name, if you explore everything in there you can find out all about me, my name, pictures of me climbing and the level I climb at, climbing preferences, where I live. Basically it just lets people know who I am and that I'm a genuine person.
If you don't create a profile you get a grey arrow like yours. People are suspicious of grey arrows, that's why people are calling you a troll. A troll is someone who creates a fake profile and lies about who they are, usually with the intention of winding people up.
If you click on the grey arrow you'll be invited to set up a profile, just some basic information will help, you don't have to tell anyone your full name or post a picture but details like your age, where you live and your climbing experience will help them to decide if you'll make a suitable partnership. Setting up a log book would be great too.