You may use a pseudonym if you want to protect your own identity, so that noo ther information will be reveal and its up to you if you want to share even a small peace of your information, pictures of some events and etc.
Recurro a la conocidísima viñeta de Peter Steiner publicada en The New Yorker en 1993 para ilustrar una buena entrada de Mike Masnick en Techdirt sobre el uso del anonimato y los pseudónimos en redes sociales, "What's in a name: the importance of pseudonymity & the dangers of requiring 'real names'".