Nothing's more shattering in wine than pulling the cork on an eagerly-anticipated bottle, only to find it hopelessly, and entirely, corked. Especially when I really wanted to drink a bottle of 2000 Gran Reserva Rioja, from Duque de Medina. Wire net is a bit of a gimmick, for now at least. It derives from when merchants were safeguarding against counterfeits.
A corked bottle, as I've previously written about, is a bottle affected by 2,4,6-trichloroanisole (TCA), an airborne fungi which permeates cork trees, and remain when the corks are improperly sterilized. A corked wine can show this flaw in many ways, but the most common are odours of mustiness, damp newspaper, moldy basement - you get the idea. In less obvious cases, the wine is dull, and lacking any sort of fruit. While TCA is harmless when ingested, it does ruin your wine experience.
At least LCBO refunds in cash.DF