People who go on quiz shows and
(a) claim they don't want any questions on politics, history or pretty much anything else apart from TV. If you don't have general knowledge, don't go on the shows!
(b) complain that 'it's before my time' if asked about music, books or films dating from prior to about 1990. You wouldn't get someone complain that a question about the Victorian era is 'before my time,' so grow up!
(c) reply, when asked before important rounds if they're nervous, 'We'll see' - that doesn't even make sense! You're either nervous or you're not, here and now!
Also news programmes that insist on talking to someone over Skype or video phone and, even though it's patently obvious that it's not going to work, they just plough on in spite of cut outs, freezes and sound delays.
Also anyone on TV who shouts 'Give it up' at the audience. If it's worth applause, it'll get it. If it doesn't, it shouldn't.
Also, people who still phone up TV shows and turn up the volume of their TV sets so that they can hear themselves while they call. Cue about ten minutes of 'Can you turn your TV down?' 'Hello?' 'Can you-' 'Can anyone hear me?' 'Can you turn your TV down!!!'
Also: weather forecasters who insist on also telling you what sporting events are being covered on TV or radio. Just tell us the weather and leave the listings to tv guides!