Not annoying as such, but a girl I went to school with lost her mother recently. I wouldn't wish that on my worst enemy, but it's the things she posts on Facebook that I find a bit creepy.
Just yesterday she wrote on her mum's wall, saying how much she missed her, and wrote a big paragraph about how she was coping, and how work was. She also tags her mum in any status she puts up. This is all a daily occurence.
Undoubtedly she'll still be devestated, but I just find it slightly wrong.