Tips 1 - 4
1) Use common sense and pay attention to your gut reaction. This is often the Holy Spirit in you, warning you that things may not be right.
2) If he or she sounds too good to be true, he or she probably is to good to be true and isn’t being truthful on his or her profile.
3) Listen and watch (by video) for signs of a temper, control, depression, etc. and run for the hills if you sense this person needs therapy first. You aren’t going to change him or her. Let the person get help.
4) Use a free email account with first name and something else. This way a person cannot search all your personal details.