2. Mexico City, Mexico:

Mexico City, the political, social and economic hub of Mexico is second on the list of worst cities for techies. This city is one of the most important cultural and financial centers in North America, and has a population of 8.864 million as of 2012.    

Mexico City, the largest city in Mexico, is plagued by violence, constant traffic issues and high level of pollution. And as per wiki.answers.com there are zones in this city that are unsafe even during the middle of the day. Services such as garbage disposal and public transportation are chocked full, and do not carry out their services efficiently. Like other developing cities, former rivers within city have become open sewers and environmental degradation has become synonymous with the city. Drug abuse, alcoholism and organized crime are some of the other issues that earn this city a spot amongst the worst destinations for techies.