Yes there are as a matter of fact there are a government that banned bitcoins because they are against it. And that government js of course the Chinese governmenti do not know the exact reasons why do they banned bitcoins but of course the main reason of it is they do not want it and in order to stop it they need to banned it to prevent their prime but look what happen after that, the bitcoins still rises even if the chinese are not there it means that even if the government tries to ban it, it depends to the poeple if that would be destroyed.