Historically, both Global Personals and Cupid have been named and shamed as carrying out such underhand tactics, although they both claim this was in the past and they're now squeaky clean.
Do change your password regularly and try to use a mix of letters and numbers that will be difficult for others to guess. For more infoon passwords, email and staying safe, check out Ask Leo where you'll findloads of great advice.
Niche site might include, for example: people into uniforms, horses, or fetishes (Horse Lovers Dating, Army Singles and Fetish Dateaway).
Hardly surprisingly, there are sites for just about everything you can imagine, from folk seeking particular sexual activities, to sci-fi fans, vegetarians, motorcyclists and even people in prison.
Also, the address of the website should start with "https://".
(This might not appear until you reach the page where you enter your card details).
That's not to say you shouldn't trust people - just be careful.
Don't reply to online daters who give out their email address in their first message to you - particularly if they give you a lot of spiel about how much they like and admire you and want you to be part of their lives.Here's a few Do’s and Don’ts to get you started: Don't use your real name or any identifying information in your online dating profile or other details.Be careful when you do give out personal information and consider: What the other person might want the information for. Don't assume that other online daters are being completely honest.If you're not sure what you're looking for it's generally best to start with a well-known site that has a good reputation.When you're familiar with how everything works, you can always try some of the sites - these cover topics that, to the uninitiated, might seem less obvious.If you have any doubts about the site, keep away from it.