Watch out for the following two types of dangerous situations:
Physically dangerous men
The serial killers often seek positions of power, and jobs that can provide it. Such dangerous individuals seek lonely women, away from their support network and also mentally challenged women, who can’t judge the danger.
They propose to meet in remote locations, where nobody knows the woman or him. That was the case of one of the victims, who chatted with the security guard on internet and agreed to meet in a motel fifty miles away from her house just for sex. Such men often strike on the first date, so never agree to meet in a remote location with somebody you don’t know.
Only meet in public places, where there are a lot of people. Don’t show him where you live until you are sure he is safe. Do not maintain cyber discussions with anybody who hints abusive behavior, who makes inappropriate sexual comments or who proposes to meet you just for sex.
Additionally if you have any doubt, make comments such as you are meeting your friends right after the date.
The second dangerous group are professional scammers.
Fake Mr. Right trying to get money from you
In the recent decade there has been a huge increase of cyber crime where the scammers use traps to get money out of naive people. While I knew about many of the quick schemes, I wasn’t aware about the one targeted at single women over 30.
They misuse that fact that most women want to have serious relationship, feel pressure to start a family soon and they take advantage of the weakness that women want things to happen "naturally without doing anything."
It has never been easier than today to do “target advertising” to a specific profile of women, for example using Facebook marketing features. While FBI and other national law enforcement agencies are aware of this, there is no international jurisdiction to prosecute the criminals, running their operations mostly from Nigeria and surrounding countries.
A psychological analysis of how exactly are they able to brainwash even intelligent women is described in detail in my book.
Warning signs on this topic is also provided by Consumers Advocate Organization: