Com farming is showing cowardice and damages your pride.
Even if the team runs or camps , still it's shameful to com farm because it looks like you give up.
If that happens to me , i just do nothing and leave them in their shame
It's just as shameful as getting 2 kills and running or camping the whole game
I would attack the COM as a lure, but not kill unless I most definitely have to.
Usually attacking a COM is good enough of a lure.
But it's just the same as giving up if you're only going to kill the enemy team twice and run. That doesn't prove you're better at all, because you couldn't even get more than 2 kills, so who cares about the win!