Gahhh!!!

[Abaddon]

First and foremost on todays irritation list is the number of people who can't tell the difference between "your" and "you're"... - it's not that hard!

[elsiegee40]

If found this in Private Eye this week:

 

"How to console a grammarian: their, their, they're"

[sonofsanta]

Cover all your bases with your'e and theiy're, that way you're bound to be mostly right!