* Various insects like to hang out near rivers and bite people.
* People trying to escape from them are liable fall in to the river and drown.
* Even if they can swim, they are very likely to be eaten by the phirana fish, crocodiles and alligators which often live in rivers.
* If the river is too cold to support such creatures, there may be risk of death from hypothermia.
* People go for romantic walks next to rivers instead of working hard and so the economy suffers.
* Rivers force road builders to build bridges, which cost money.
* Rivers are the cause of oceans, which are even more terrible.
Truly, rivers are very dangerous and should be banned.