I have to admit, I'm usually pretty laid back about most things, but when someone drops the "someone dodge" crap, it really gets under my skin. My answer is always the same. "you want a dodge, you do it." And when they threaten to troll, I just prepare to mute them as soon as the match starts, and ready the report button for griefing after the match. For some reason, the people who say this never want to be the one to dodge themselves. My guess, they've already dodged so many times that they are already facing penalties for it, but that isn't my problem and I'm not about to put myself on the queue dodging penalty list just to pacify someone who isn't happy about some roll or other.
My most recent encounter with this was over the weekend in normals, when I was trying to get my second match in with a friend for the Xayah/Rakan icon. My jungler banned him out in champ select despite me having him selected. I was frustrated, since we'd played quite a few matches, and kept getting one or the other of them banned or picked on the other team, but I figured I would give him the benefit of the doubt and asked if he hadn't noticed that I had him selected. He proceeded not to say anything, but his duo partner then said he noticed, and banned him on purpose because he didn't trust me (a total stranger) to play him decently (in a normal match, not ranked or anything). I was kinda stunned at that point, and didn't say anything, but the fifth guy on the team, who wasn't with either duo got pissed about it and went off on the guy, and they started arguing and people started yelling for each other to dodge. My duo and I were just like "... this is gonna be a fun match...." I have no idea who actually did the dodging, but thankfully someone dodged. Hell, it might have even been someone from the enemy team. Whoever it was deserves a medal or something. I owe them one!