Well I will first start by apologizing because I didn't record the Q & A session with the Game Designers and DDXP '09. I wish I had now, but one of the very big things that Stephen Radney-MacFarland made mention of the fact forced movement should have been called forced relocation. The real issue might be with clarification of the word "move," especially as it interacts with push/pull/slide effects.
Both Chris Sims and Stephen Radney-MacFarland agreed that Forced Movement should not trigger things like blade barrier and wall of fire. However using those effects to deposit bad guys in those effects so when they start their turn they get kerploded (no kerplode is not a technical term) by the power in question.
Also take the CS ruling about Storm Pillar
Thank you for contacting Wizards of the Coast game support! Please allow me to clarify how this works.
When a character "moves" into an area, it implies action (like a move action would) and refers to intentional movement.
When a character "enters" an area, this refers to entering an area by any means, including forced movement.
Forced movement does not trigger the Storm Pillar. We intend to provide an FAQ for this in the future. And another clarification, the Storm Pillar's damage is not limited to once per round. A character moving through multiple adjacent squares will be damaged multiple times. If the terrain and positioning allow it, you can potentially trap an opponent so that in order to move where they want, they'd have to pass through 2 or 3 squares adjacent to the Storm Pillar. He would take damage each time. Heck, if you had two Storm Pillars near each other, a character entering a square that is adjacent to each of them gets damaged by each one.
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So, according to this ruling, Storm Pillar, Wall of Fire and Storm Cage do not instantly damage enemies that are forced into them. Cloud of Daggers, Freezing Cloud, Stinking Cloud, Cloud Kill and Acid Storm still do. And take note that it is said that WotC is going to provide additional info on this over all. It means that WotC is more then aware of the issue and are going to take steps to address the community as a whole when they can. I can wait...and in the end I am pretty sure I will be on the "right side" of the fence on this one.
So regardless of how you adjudicate rules Fitz (and judging by many of your posts, you are a strict RAW guy, which is fine, I honestly don't care either way how you play your games and what rulings you make, and you really ultimately should give two figs about me and mine.) At some point I think common sense and fair play needs to be taken into account...That's why I live by Rule Zero!
But I digress...A Power is given a effect and damage value based on its level and what it does. Any power that can potentially do this massive iterative damage like that runs it well beyond its base power level and thus makes it...Broken? Unfair? Out Right Silly? All of the above I say.
So...I will side with what I literally heard from the horses mouth. Take it or leave it honestly. I stick by what I deem fun and fair. And you should too.