At the risk of being insulting, Duh. That's why I'm the DM. Arbitrating what "should" and "should not" happen in my game is an important part of my job.
No insult taken. But I think you may have missed my point. The reason for the quotes was to suggest that they are not a neutral arbiter. Rather, he/she is introducing his own variant of the core rules - a.k.a. a house rule - that has more to do with what he thinks is appropriate due to his own personal preferences that have no foundation in the rules or by logic.
It is completely arbitrary to rule that Gods don't want there angels to be fax machines in that doing so is pure DM whim. The reason for this, is that it is just as plausable to rule that a God was happy to aid his followers in communicating information to the larger body of his church. After all, if one of his chosen representatives thinks that the message warrants such forms of communication, might that not actually be the case. Even if it wasn't, then I would expect said God to pay much more close attention to ALL of the cleric's spell casting and not grant spells when used for similar apparently logical tasks. Example - God does not want to pester his divine agents when the cleric can't see. So summoning a lantern archon for a continual flame would not be permitted. After all, if the cleric thought to bring a torch he would not have that problem. Moreover, that is the express reason for granting the 0th level spell - light. As a player, I would not want to play with said DM. He is taking control from my player - and unwarranted control at that.
The use of Tw/oE from the Lantern archon is an often overlooked ability. Meaning that players and DMs alike become accustomed to the summon functioning a certain way. Now that someone innovatively figures out a new way means that the said summon spell gains an increase in its utility. All of a sudden, now it can't be used like that. Nope, not buying it. Saying that the God doesn't permit this is just a cheap way of getting out of limiting the function of a spell to suit the DM's taste on balance - which is expressly against the characters.
Finally, a wizard, which has no ties to a church surely would not be limited to this tactic as he could care less, if the lantern archon does not like being used as a messenger. Therefore, this is in fact unbalancing.
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