Only limited information can be harmful. You might be hurt by the fact that your wife cheated on you, but once you know exactly why she did it, you might understand and not be as hurt. Assuming that any piece of knowledge is bad for you presumes that you do not know how to handle it, which would be due other lacking information. Essentially, if there is only one piece of information that you would know, yes, but if we're talking about this in the perspective of omniscence, then no.

Tem42: it's called misinformation, if you knew all the information then you would disregard it as an opinion.