What contact information should you give out when you are communicating online to unknown people or filling out details on a website?

An alias

Using your real first name or any other personal information may be dangerous. To mask your true identity and prevent random contact with people you dont know or trust, the best solution is to use an alias. Try to find one that suits your interests or your hobbies. Whatever you choose your alias should be not too revealing and, most important, fun.