The Mischief Pack is an idea that originated in the DKMU. It was introduced in The Assault on Reality, in their Operation Virus project. The ideaology behind Operation Virus lends nicely to glamourbombing, as does the Mischief Pack. The purpose of the Mischief Pack (or MP), is to provide all of the necessary items for glamourbombing, so that they are on hand and ready to go.
The Mischief Pack consists primarily of a backpack, sack, messenger bag, pizza box, trash bag, or whatever is on hand, filled with the tools necessary for glamourbombing. These tools are heavily dependent upon the glamourbomber’s preferences, but common things to include are:
sheets of stickers
Some further information on mischief packs can be found on the hypersigil blog.