As one of the blasters who used to team with a tank to do this, I tell people that I was partially responsible for the game having target caps. Around 30ish Alan and I would round up ~90% of Brickstown into a dumpster and onto a pile of twenty or thirty trip mines for hilarious BOOOM! times. Of course that sucked for everyone ELSE while the mobs respawned but we'd gotten our xp/inf. The target caps ultimately are a necessity. Of course I'd prefer if they were all consistent at 16, but we can't have everything.