Wanderlust has claimed the actions of some entrants harm the environment by leaving litter and causing erosion.

BBC: Three Peaks Challenge on Wanderlust endangered list

But the Asian crisis, like the 1995 Mexican crisis before it, has shown that some types of capital can flow out even more quickly than they flowed in, causing serious economic harm in countries with badly regulated financial systems.

ECONOMIST: Can capital controls stop poor countries crashing?

We must be prepared to accept some false positives (predictions of harms that would not have occurred) in order to prevent some true positives (predictions of harm that would have occurred had we not intervened) from causing irreparable damage.

NPR: Rules Should Govern Torture, Dershowitz Says