Websites are hacked daily and their data is stolen by hackers.
It will rapidly scan popular sites and services for email addresses, usernames, names, and phone numbers to build a comprehensive profile of a person.
This isn’t necessarily traditional hash or metadata specific – cropping or resizing an image is not a foolproof way to defeat this (as I show in the screenshot below, where Tineye and Google correctly identified my profile selfie which is substantially cropped on social media).
Do not trust a person right away; do not give your personal information especially if you are not yet comfortable to the person whom you are talking with.
Remember, you are looking for a friend or a lover and not a stalker. You should be honest on everything you will say and everything about you.
Matchmaking is the process of introducing two persons for the purpose of dating and ended of being a happy couple. Examples of these are match.com, cybersoulmail.com, and more.