Using my cellphone in a public place. I know, I know, the purpose of a cellphone is to allow us to talk (nowadays, to be "online") anywhere, anywhen, anyhow, whatever. But I seriously dislike talking on my cellphone in public, and it really annoys me when someone's doing it. In a bus, for example. People tend to talk really loud on their cellphones if they are in a bus, and everyone can hear - or rather, cannot avoid hearing - their pointless conversations. Likewise, I don't like to be tagging along with friends and to be constantly paying attention to whoever is calling me or texting me - in other words, to someone who's not anywhere near me, physically speaking. People who never let go of their cellphones, who are talking to me while ceaselessly texting someone, they piss the hell out of me. Most people seem to consider the cellphones a great progress. I think they were the first step into the destruction of what we call "privacy".