As already explained at length, I believe that the current state of HXH demands special treatment in terms of previews. We´re at a point where one episode contains like 10 seconds of realtime events. The episode where Zeno and Netero entered the battle would have been infinitely more impactful if it hadn´t been spoiled in the preview. Meanwhile, because I had stopped watching previews, the episode where Gon and Killua finally approached Pitou was super awesome. Had I watched the preview I would have known that already, and all I´d be left with would have been an interesting, but expected dialogue. A good comparison would be the final episode of Death Note. Imagine the preview had shown how Light dies. Would it still have been an interesting episode? Sure. But going into it with knowing about a character´s death just ruins tension and emotional impact.
The movies-analogy is terribad, because nobody refutes to watch those after-credits scenes just for the slim chance of it being relevant in a movie-sequel several years down the road.
Get lost, idiot.
"She's the only non-loli girl in the show, your honor!" will be my defense in court