It's pretty easy to tell: They send the same message over and over, often with the same link.
But there's a type of dating site scam that's far trickier to spot, and the people who operate it claim to be making thousands of dollars every month fooling vulnerable men.
If you've used a dating site or app like Ok Cupid or Tinder, you'll have noticed the hundreds of fake profiles that exist on the sites, seemingly designed to make you hand over your profile to scammers.
Now there are some risks attached to webcam use, but by following a few simple steps you can reduce the chances that you'll come to harm.
Hackers are able to gain access to a victim's computers using a piece of malicious software (malware) called a Remote-Access Trojan (Rat) which infects the victim's computer or device with a virus.
Scammers may use carefully prepared webcam images or footage of themselves which may initially seem flattering, but can increasingly become coercive and explicit.
They steadily increase pressure on you to participate, which they record and later threaten to distribute online.
Other reports include the scammer manipulating the images taken, to make them seem worse.