I'd say it depends on the circumstances. There was a guy that I met while playing poker on Myspace, and I spent the first night we were together in person with him. However, in that situation we'd already been talking for 5-9 hours a day for about six months, and he'd just moved here from about 2,000 miles away to be with me. We are now married with a baby on the way, and neither of us have ever been happier. Whether you meet in person or online, all you will ever know about a person to start with is what they choose to present to you, but time and open communication will bring out the real person whether you are face-to-face or not. If it's someone you just met and don't actually know at all, well, that's up to your personal code of conduct.