People using 'less' when they should be using 'fewer'
EDIT: you guys have dug up some truly horrible pisstakes :D Thank you for those.
To the serious folk - relax a little. This is Mildly Infuriating, not I'm dying if this doesn't stop. As a non-native speaker I was taught a certain way to use the language. The rules were not written down by me, nor the teachers - it was done by the native folk. Peace!
It is also a tool to allow common understanding between a diverse group of people. I’m not saying that less/fewer is an important rule. However ‘anything goes’ is going to have an impact on people’s understanding of bothe you and your message