Besides obvious negatives like has 4 kids with 4 guys or bad body odor name some signs you have learned to be wary of with chicks 
Here's 3 off the top of my head:
-She refers to herself or thinks of herself as a princess. It's bad news (because as long as you're no pedophile the girl ur interested in is probably much older than 10, around the time its normal for her to think she's a princess) and screams extreme high maintenance and selfishness. It's not cute, it's sick
-She used to do LSD. Of course current LSD use is a big problem, but past use may not be so obvious. I'm not up to date with the scientific data on hard drug use, but I think this drug in particular has permanent mental side effects. The girls I have known have extreme problems with anxiety, depression, and are just a mental wreck, more so than just your average chick.
-One of her heroes is Marilyn Monroe. OK sure she was a sex symbol but she had affairs with married men while she herself was married...was an incredible ditz...a drug addict...and committed suicide. What does it say about a girl who idolizes the queen of drama queens? Trouble
Feel free to add to this list

Here's 3 off the top of my head:
-She refers to herself or thinks of herself as a princess. It's bad news (because as long as you're no pedophile the girl ur interested in is probably much older than 10, around the time its normal for her to think she's a princess) and screams extreme high maintenance and selfishness. It's not cute, it's sick
-She used to do LSD. Of course current LSD use is a big problem, but past use may not be so obvious. I'm not up to date with the scientific data on hard drug use, but I think this drug in particular has permanent mental side effects. The girls I have known have extreme problems with anxiety, depression, and are just a mental wreck, more so than just your average chick.
-One of her heroes is Marilyn Monroe. OK sure she was a sex symbol but she had affairs with married men while she herself was married...was an incredible ditz...a drug addict...and committed suicide. What does it say about a girl who idolizes the queen of drama queens? Trouble

Feel free to add to this list