Little did I know when I penned my previous missive on the inadequacies of Bluetooth, that these ubiquitous metal earplugs could actually be used for evil. Well, I have to report some sinister developments. If you don't want to end up as a seven-foot-tall humourless metal android with a tinny voice and ostensibly no hole to relieve yourself from, I suggest you bin the things.

Actually, even if being made out of metal and having no emotions appeals to you (maybe you're an Immigration Officer, for example) I'd just chuck them anyway. Don't believe me? Then take a look at the Cybus Corporation web site....