It's not uncommon, unfortunately (although the penalties are usually not so extreme). Usually it also happens to be the countries that have some large-scale territorial disputes with neighbors.

For example, in Russia, there's a law against "public calls to actions that would violate the territorial sovereignty". In practice, this means that saying something like "Crimea was illegally occupied" is technically illegal, and occasionally enforced.

I recall India mulled a similar law with Jammu and Kashmir in mind, although I don't think they ended up passing that.