There is no such information that is bad information. Bad information is a myth. There is true information, there is false information. There is no 'bad' information, how can there be? What can be bad is bats, or people, or material possessions. How can information be bad? Or, for that matter, how can it be good? It is just there, waiting to be discovered, waiting to be found out.
All that information is, is dangerous. It is the most perfect weapon. Information, whether true or false is always dangerous, with one requirement. Information, to be dangerous, must have context. All useful information is dangerous, and has context. Useless information is not dangerous only so long as it has no context, when it achieves context, it becomes dangerous, becomes useful.
Take two seperate pieces of information.
There is a man called Peter John Kay, who is addicted to cocaine (Lots of people are addicted to cocaine, it is sad but it is true).
There is a man called Peter John Kay, and his father is the Prime Mister (Being the Prime Mister doesn't mean you're not allowed to procreate, what's your point?).
Taken seperately, these two facts give you nothing. Together, they make you the holder of a secret that can break Government. Does it matter whether the information is true or not? If enough people believe it, no. If enough people think you are famous, it stops mattering that you actually aren't.
But if you're in the minority, if you're the only person who knows that the son of the Prime Mister is addicted to crack, it doesn't really make a difference. Everyone knows that he's not on drugs. He's such a nice boy. How dare you say something like that?
Information is dangerous, whether true or false. What matters is the number of people that believe that information. This can, obviously, change pretty rapidly. This is the reality.