That doesn't make it acceptable, but it's hardly the kind of systematic suppression of free expression you seem to be invoking.
Context is important.
More accurately, this article is about one person in a nation of 300 million who was jailed for speech, which gives us no grounds for assuming that either a large or small number of people are being prosecuted for things like this, other than the number is greater than one. It's a systematic problem that portions of the system feel free to jail for pretty innocuous speech.
How about Cameron D'Ambrosio last month, or the unknown number that were not "notable enough"? D'Ambrosio only got out of jail because the grand jury refused to indict, not because prosecutors weren't willing to prosecute.
Beside whistleblowers, there is also that dude that defended Al Quaeda (he only spoke in favour of Al Quaeda), and some others I don't particularly remember now...
0. http://www.thisamericanlife.org/radio-archives/episode/414/t...
1. http://www.wired.com/threatlevel/2013/06/teen-jailed-for-ter...
One is unacceptable.