Why should fast foods be banned?

It should be banned for a number of different reasons including:

1. Unhealthiness- fast food (hotdogs, burgers, chips, chicken etc...) is generally very unhealthy and can cause you many problems including Diabetes (see 'What is diabetes?'.)
2. Litter- Popular fast food restaurants (including McDonald's, KFC, Burger King and Pizza Hut) are very commonly littered with the leftover packaging and drink containers.