The first name and last name thing annoys me the most. I can't use my real name in most online services (yes, Facebook and Google, I am not using my real name,

The first name and last name thing annoys me the most. I can't use my real name in most online services (yes, Facebook and Google, I am not using my real name, coz I can't!), because my official name is a mononym. When registering for PayPal, I had to sent at least 10 emails to get someone to respond to be able to use my real name for transactions.