9 tons of liquor and perfume down the airport drain

From the US Today website :

The Transportation Security Administration (TSA) says it collected more than 9 tons of oversized bottled items at the airport — mostly alcohol and perfume — from October through January.

Hundreds of airline passengers each week returning from Caribbean vacations are trying to go through Miami's security checkpoints carrying bottles of alcohol only to be told their spirits threaten security. So much is accumulating that the airport has convened emergency meetings of transportation and tourism officials.

The trick here is to always place liquids into your checked bags and not the carry on even if the other country doesn't care. Also note that some airports have customs OUTSIDE of the security check point so you may have to re-enter with the checked bag and thus have to trash your liquor.