Why are ants bad?

if ants as in the animal/bug then it could be that some can cause painful stings and bites, army ants can destroy almost anything, it can take as little as one scouting ant to tell the colony that there is food there and a lot more.

Hope that helps!

Who said ants were bad? Sure the fire ants are pretty bad but just don't get in their way. They are not like the Indiana Jones ants :D