After being on CC for a few years, it becomes easier to notice patterns in some people's behavior.
I am certainly not knocking online possibilities for relationships, seeing as I have often stated that I have been going to meet people in person whom I first met in writing (as pen pals, etc.) since I was about 14 years old (I'm just slightly older than that now.)
I'm not an expert by any means and I have a busy life, so I'm not here as much as some people, but if I observe something about a situation that makes me raise my eyebrows... I'm always torn about telling the person I know and care about because I know they won't believe me.
Not too long ago someone was telling me about a person they had met on CC and was totally infatuated with. My friend told me that their sweetheart had never been married and did not have children-- or at least, that's what was claimed.
Well, I had observed that this particular person had been on CC under a couple different names, long before my friend had ever gotten there--and I could have been wrong, but their posting style, grammar, and style of joking was always the same, so I was about 99.9% sure that it was the same person, and so were my other CC friends at the time. I finally decided to tell my friend that this person they were telling me about had originally claimed to have been divorced and had X amount of kids under at least one of those usernames (I told my friend to ask that person about "-------" and "------", because I remembered the names of the kids they claimed to have had at that time.)
I have no idea which story about that person was true.
My friend was in shock, but in the end, chose to believe what this person was telling them, and stopped talking to me. (Neither of them are here right now, at least, not under names that I've noticed, which is why I'm telling this story.)
I don't know what happened, but last I knew, my friend did admit that this person often "disappeared" for no reason and with no explanation, and that their "relationship" was currently "on hold".
Proverbs 4: 23 -- "Above all else, guard your heart, because everything you do flows from it."
Please, be careful out there!