The only thing necessary for the triumph of evil is for good men to do nothing.
Kids are a lot more tolerant than adults are. Haven't you noticed that? They don't see skin color, they don't see that their friends' parents are drunks, or ne'r do wells, or gay. They don't see any of those things until their parents start pointing them out.
A kid will only be scandalized when you tell them they ought to be.
While I can understand your statement to ignore them, the comment reminds me of the statement by Edmund Burke:
The only thing necessary for the triumph of evil is for good men to do nothing.
Could you possibly overdramatize this situation any more?