Mexio City's most dangerous places?

I've lived in mexico City for about 5 years so I decently know all the stuff about mugging and pickpockets and such. I'm specifically curious to know what people who also know the city consider to be dangerous neighborhoods.

I know that Tepito at night is a no/no (but okay during the day) and it's best not to get into Iztapalapa period and I've also heard Ciudad Neza is dangerous (but I've never been to that place before).

However, people lately been telling me la Colonia Doctores is the most dangerous place in the city. I go there almost everyday even at night for the past 2 years and I've always been fine despite walking completely alone on dark sidewalks at oddball hours, but I know some people who knows a person whose car got hijacked. The fact that they stepped up the security of the General Hospital because 3 people were shot when burglars tried to rob the bank a month ago makes me wonder if it's more dangerous.

Personal imput from others would be nice to hear. ;)