Yes, there are lots and lots of guys on the internet hoping to get women to help them get their jollies. There are women that do this too. If it is a reputable dating site, or website, maybe you can report them to Admin. I am a member of a site that is not really a dating site, but is used as one, which is ok with admin, but it's not the sole purpose. They do delete members right and left for joining just to get sex talk or action.

As you get more experienced with meeting people online you will pick up signals and learn how to deal with these things.