I've yet to encounter someone pwning it up with the mortar, but it falls under my personal category of 'Yellowbelly Weaponry' as it involves being far away and safe from your enemy. Anyone who uses it for the majority of their kills in a round is a coward.
Of course, I have yet to unlock the mortar. Once I do, the mortar will fall under my personal category of 'Superbrave Hero Weaponry', as it involves breathtaking skill and timing to use correctly. Anyone who uses it for the majority of their kills in a round is a hero who should be commended.
Seine River, spot tank, mortar guy takes it out, move on.