If not, I find it hard to believe that after long enough a period of time of noticing absolutely no activity on your posts, people won't catch on.
Also, yeah if someone is a troll I feel like it's 100% fair game to troll them back. And this is the best counter-troll of them all. I had exactly the opposite reaction of yours when I found out about the shadowban - finally! Some way for us to fight back and give them a taste of their own medicine. Assholes that they are.
There are only two problems with this - one, when people are shadowbanned wrongly/arbitrarily with no right to a fair and speedy trial in a court of their peers, and two, hypocritically I have a tendency to troll sometimes and this may or may not suck >_>