I did a flashpoint on my Vanguard tank two days ago.
before we started healer was demanding guard as protection from adds. Throughout whole flashpoint he was hit maybe few times on one pack when i didn't tanked that well
but he lost max 1/3 file and this one only pack for whole flashpoint that he got hit from adds.
Midway thru the flashpoint as asked him does he still thinks he needs that guard, he never replayed.
When we finished he said:
"You should of guard me as I had least health"
and then he quickly left the group.