While getting catfished, or tricked into falling for people who lie about everything (right down to using someone else’s pictures), seems to be the common assumption about meeting someone from the internet, it’s really not that common. It does happen though. This is why you should try to use the internet as a means of meeting people, and use subsequent in-person dates to get to know them. You aren’t meeting someone with the intent of going ring shopping if things go well.
While dating sites have plenty of attractive and very successful people, not everyone will look exactly like their pictures. While I’m not saying you should be expecting a man in a wig to show up, you should kind of automatically assume that their pictures were old or edited, or at the least, something that shows their very best light. Not that that’s always the case, but just keep in mind that you can never truly know someone you haven’t talked to in the flesh.