Sometimes you can safely introduce additional adds or trash packs that does nothing other than melee hitting the tanking, giving you free GC procs, by extension dps and hopo generation which leads to higher SotR uptime making you tankier, not squisher, aswell as the added benefit of more vengeance.
As long as you can introduce those extra adds in a safe environment, i.e. they wont bash your skull in and break your neck like a toothpick, I see no reason why not to.
Blizzard is giving us a great (readas: broken) tool that makes us scale with the amount of attackers we have one us in terms of our dps and damage mitigation, if we can get more weak hitting mobs on us other than the boss, then why the heck not. Add on top of that additional vengeance.
We might aswell abuse this as much as possible, with caution however.
And btw, I love the paladin forums.