Make sure you do not use any aspect of your real name, or any other personally identifiable such as birthdates- even birth years. Your username can be searched, and anything tied to that username can come up easily.

Can you tell when someone was on POF last?

If youre trying to find people that have been active recently, you can choose to sort the search results by the “Last Visit” parameter. This information relates to when a person last logged in to POF.