Why is it wrong to say be careful? I would rather not have to say it but in some cases it needs to be said.

The Soham murder case of 2002 has been brought up in the news. Back then the case was all over the tv radio and newspapers. My nieces were 11 and 9 at the time. They knew the names of Holly & Jessica and brought up the subject. Their father was there too. We calmly told them about being wary of strangers and if anyone tried to entice them into a car etc, to run and shout as loudly as possible.

I was saddened that the subject was brought up but, in a way, glad that it was. I have no doubt that children would have been talking about it among themselves.

Would it be wrong to tell you about a pub with a reputation for violence? Or be wary of an area known for muggings etc?