Do not draw attention to currently overloaded items.
Currently, federal law imposes the following limits on 1.4G consumer fireworks:
500 grams of composition in a single item (such as 500 gram cakes)
60 grams of composition in an aerial shell
50 milligrams of flash powder in ground salute (such as firecrackers)
130 milligrams of flash in an aerial salute (such as cake shots)
Despite this, every year certain fireworks are manufactured (sometimes intentionally, sometimes not) with more than the allotted amount of composition (most commonly aerial devices that contain more than 130 mg of flash, the composition responsible for loud report). These devices are not considered to be 1.4G, and are known as overloads. Many of these slip past American inspections each year and make it to the shelves of retailers/wholesalers. Because they are labeled and packaged just like every other consumer firework, it is impossible to determine whether or not they are overloaded unless the device is cut open and its powder content measured - though most seasoned pyros can tell just by the sound of the report. Fireworks companies caught selling these - even if they are unaware - can face stiff penalties.
When somebody mentions the name of such any device on the public forum, the authorities read the post, locate the dealer, barge in, confiscate as many items as they can, impose massive fines, and otherwise do their best to shut place down permanently as part of their crusade to end consumer fireworks in America, even if the owner honestly had no idea that his products were overloaded (likely because of a labeling mistake in China). This hurts the owner as well as everybody in the region who bought fireworks from that store, and the subsequent blown-out-of-proportion style media coverage ("Highly explosive stockpile of TNT fireworks found in rural store! Is there a connection to terrorism? More at 11!") further demonizes fireworks, and may even threaten future legislation to legalize fireworks. This has already happened a couple of times on this forum during the last couple of years: somebody posts about an overloaded item located within a very specific geographic region, and within days the local firework dealer gets raided by the CPSC.
Do not solicit suggestions for overloaded items:
On the same token, do not post asking for "hard breaking shells", "salute shells", "loud cakes", nor ask for items that are "similar to"/"just like" other overloads (eg, "I'm looking for something just like a thunder king.")