In some cases the adversary is shooting and scooting and all you will do is ensure collateral damage that creates 10 insurgents for any 1 you might get lucky and kill. Like I said, in some cases, everything is situational dependent - but to just make a blanket statement that anyone taking mortar rounds should return in kind - all the time - defeats much of what we have learned over the last several years - and forgot over the last several decades.
Thanks Colonel !
I spent some time reading your recent interview, and I agree collateral damage in the E5's case would have merely created another 10 insurgents, and maybe one dead.

I didn't mean, she should have gone full auto and sprayed the surrounding area, but then how would one write the ROE regarding the use of "semi-auto, carefully-placed rounds" while being showered in mortar fire ?

Point well taken !
Regards, Stan