Then don't try to get through to him!
If you find that he's doing something that bothers you, more than likely, it will bother others, too. I know because it's happened in the past. Just wait for one of us to point out his error in judgment, and we can take care of it. And by we, I mean me. I'm typically the best at defusing situations (not to toot my own horn), and I've given up, for the most part, on letting my emotions get in the way of rash judgment on the forum.
Just hold your peace. Because you know how it always ends. If you find that your solution does not yield points on the test...my experience tells me that the answer will still be wrong on the NEXT test. So...just give it a try; bide your time, and move on to other things, which WON'T bother you, distress you, anger you, or bother you unnecessarily.
“…Judge not what a man has done, but judge what he could have done if he was a different bloke altogether. For art thou a leper? And a leper can changeth his spots…” --Rudy Wade, Misfits (Series 4, Episode 8)