No it isn't. It's a means for Russia to export propaganda to the West. That's why we're in this mess.
Access to the Internet should be a human right in today's age. Depriving any nation state of that right is like foisting upon them a poverty greater than an economic one - I'd argue we are all poorer off if we have 2 North Koreas.
Though again, I'm very reluctant to take the position of cutting off a country because their leadership is being daft. If anything, it would be prudent to leave the door open so resources can be used by the populace to resist.
Unless, of course, there is actually majority support for this action.