Zad pretty much summed it up correctly: actions have consequences. There is a different standard applied to different characters.
Wizards and Sorcerors are generally understood to be self-absorbed power-obsessed madmen. This doesn't give them a free pass, but it means less is expected of them. It's one reason that they can't summon planar allies as easily.
Bolo suffered a restriction because he was a druid, and druids are held to a higher standard by the Elemental Princes. Bolo summoned three different elementals and basically maltreated them, as far as the princes of water were concerned. That just doesn't fly and steps were taken. Bolo had several remedies as his disposal; he chose one and enacted it. The bag of tricks question is problematic: as far as Bolo is concerned, and would be up to Bolo...but even if he felt they were just phantasms, watching animals be mistreated would be uncomfortable for him, at the least.
Now, if Scorch or Dravot started summoning Celestial Elephants and threw them off a cliff to their deaths, over and over again when a better option existed....well, Mount Celestia would cut them off, too. Dravot could probably reason with the higher powers there with some chance of success (living saint and all that)....Scorch? Not so much. And given that Scorch is scarce likely to bow down before the beings there anyhow, he'd probably just change what he summoned.
Now, this will never happen with Evil creatures. Why? Two reasons: the archdukes and demon princes are thrilled to torture their minions in this fashion, for one, and the very act of summoning an evil creature is a questionable activity. Second, if a good character summons an evil being and then kills it off in such a nasty fashion, they've most likely taken a step closer to being evil themselves. The only way to win here is not to play.
The only time that evil beings would cause some sort of an injunction is if it was personal (such as pissing of Pazuzu prevented you from getting air demons). Since Scorch is generally the only one who even consider such an act, it's never really come up. Now, I'm sure there are specific cases where summoning a devil could be turned to good purposes...but this ain't Sepulchrave's game here.
Saizho. 