Tedious conversations with hairdressers (If I had more money I would pay double for them to do their job in silence).
When the wire from the hair clippers brushes my skin whilst my hair is being cut.
News reporters who put on over exaggerated British accents - No one cares if you're African, Asian, Chinese, Caribbean etc. Talk in your natural god damn accent, we can still understand you.
People who do something just because their parents did/do (i.e vote for a particular political party, read a certain newspaper)
Celebrities who throw themselves as well as their families into the spotlight, invite camera crews into their homes, allow their daily life to be viewed and then get upset when someone takes the piss out of their disabled son. If they're a considered to be in a 'vulnerable' or 'at risk' group, then don't shove a camera in their face.
People who are reluctant to have a laugh about things such as mental health, abortion, sexuality, gender, race, disabilities and dead babies. You cannot live in a democracy and expect to be pleased all the fucking time. Also, humour does amazing things for getting people to talk about taboo subjects. Don't take a joke seriously and don't view it as always being derogatory.