Sure you can think about what they'll do in the future but I'm providing suggestions on what we can do now based on current behavior. And even if you're a human, you shouldn't be allowed to start posting links immediately anyways. :)
So with that cleared, this is something that is happening NOW. A couple of years ago, the cutoff date meant that astroturfing like this had a return over months or years. Now with search tools, models can be updated in less than a day with astroturfed comments.