Scams are designed to trick you into disclosing information that will lead to defrauding you or stealing your identity.
Examples of email scams include: Phishing emails Phishing is a scam where criminals typically send emails to thousands of people.
My general advice is to have fun but also be careful.
Think about the consequences of each choice you make and how, in the worst case, a malicious or dishonest or immature person might take advantage of you.
A few years ago, image recognition on a large scale was restricted to law enforcement and corporate security. Free services like Tineye and Google Images will search billions of indexed images on the internet for identical or similar pictures.