Notes:
The Faithful: Yep, like everyone is saying, they would be worthless for their intended goal (Essence Farms), costing a lot while providing pretty much nothing. You would literally never regroup the essence cost from them alone. Immobile lowers the Worship quality significantly, and "Only Worship/Really really biased towards Worshiping me" is another huge hit to how much worship they can output. The OOC reason is, of course, if there wasn't a penalty everyone would do it and that would be boring. The IC reason has to do with hidden stuff with how souls work
. This is the kind of thing you should price check if you don't want to get an unpleasant surprise.
Erasing memories: Generally, actions that effect how a God is roleplayed are impossible. After all, I can't really change meta stuff like "Well, he says he stole your memories. Now pretend like you never did that?". However, if both players agree to something like this (OOC) then it can be done, with the price suggested by the effected player. Example: God A wants to erase God B's backstory memories. If Player B doesn't want that, it is impossible. If Player B wants to allow this, he can suggest a price for the action which Player A can accept or decline.
Canceling actions: Try not to do this, its annoying. Especially when its trying to do an action, then realizing everyone is against the action and stopping. It really messes something up if we already have five pages and ten PMs of people responding to it. If it happens too much, you will all be punished by the Wrath of the GM.