I don't think you can blame someone for defending themselves against posters who are being unnecessarily argumentative and have admitted to continuing to do so even if they're blocked. Frankly, it just comes across as trying to stifle feedback they don't agree with and it's a bad look, especially when some of it is bordering on getting personal. The only reason they're not getting more pushback and feel they can keep going after certain posters is because they've scared others out of this thread once they incessantly started in on the few posters here who've tried to stand their ground.

Even though I'd agree blocking/ignoring is the best way to go, I also think this type of behavior needs to be discouraged.