With corvo it makes perfect sense, since he was framed by some of the top people in the government. It was his word against theirs, and I doubt they gave him much of a chance to get his story out there. With Geralt, it's a little more surprising since there was the missing monk, and other such factors that didn't align, but I guess in the confusion it's not much of a surprise that he was taken. And he would have been executed too, simply because someone had to take the fall for such a crime, that's just how these things go.
As for stupidest plotline... There are so many, but there's one I'm particularly sore about. Star Ocean: The Last Hope. My god, the whole thing with him creating the UP3, Faize's motivations for joining the bad guys, the bad guys themselves, it was all so terrible and cliche and just plain awful. Star Ocean: Till the End of Time's thing with the universe being a simulation wasn't great, but it never particularly bothered me beyond the typical low presentation values in that game, but the storyline of Last Hope was just atrocious.
As for stupidest plotline... There are so many, but there's one I'm particularly sore about. Star Ocean: The Last Hope. My god, the whole thing with him creating the UP3, Faize's motivations for joining the bad guys, the bad guys themselves, it was all so terrible and cliche and just plain awful. Star Ocean: Till the End of Time's thing with the universe being a simulation wasn't great, but it never particularly bothered me beyond the typical low presentation values in that game, but the storyline of Last Hope was just atrocious.