Actually many men do. Not me, but many men do this. And no I do not think men that hit on women randomly online or in real life are on drugs or mentally ill. shallow? yes. Try not to be so negative at men.

Thing is, even as the world has changed by and large much of the dating and making a connection to the opposite sex still rests with men. I do not think it's wrong or bad, inherently but my point is only to say that with that in mind you might understand better why a number of men do this. Lacking the knowledge on how to approach women many men only know how to "hit on" women randomly.