I befriended a man online when I was a young teenager. We talked for a while, every day for hours. He claimed he was 18, and after a while he'd immediately start IMing me as soon as I'd go online, as soon as he saw me show up. The guy eventually tried to coax me into sending him photos and kept trying to convince me to meet up with him because he lived in the same county as me. Looking back on it, the man had to have been at least in his 30's or 40's, because the photo he sent me at the time looked like an older photo, not from my time.
I'm convinced the guy was a creepy online predator, and I'm glad I never went out to meet him.