When your 1/13/0 ally says several times to report you for feeding.
https://68.media.tumblr.com/565a1aab03e4624f69aefdba7fc2a2fd/tumblr_nmr1derw6t1u97g13o1_500.gif
When I laned against your ally and I see that in all-chat
https://68.media.tumblr.com/82ad1c7bf690fcff859d37b0d6e6dd92/tumblr_ntilffYXmE1qcv34vo1_500.gif
Bonus points for having double their CS and an untouched tower at 20 minutes, while they lost theirs after 5 minutes of laning.
http://i.imgur.com/iY9x9Go.gif?b
Their tears are delicious.
Nothing tilts me harder than being blamed by the person whose fault it is that we're losing.