There are many things that people don't like about the rules, searches and scans imposed by the Transportation Security Administration, but something that doesn't get old — as we've pointed out before — are its pictures of things people tried to get through checkpoints.

While the TSA clearly posts a list of prohibited items, people either think they can outsmart the system or simply forget — and TSA documents some of the most outlandish things it has found on its Instagram feed.

Here are just a few.

"These knuckle knives were discovered in carry-on bags at the #NewYork Kennedy (#JFK) and #Honolulu (#HNL) International Airports," TSA wrote.

Image source: TSA/Instagram

"This samurai sword was discovered in a carry-on bag at the #Boston Logan International Airport. As you probably guessed, samurai swords as well as all other types of swords and knives are prohibited from being packed in carry-on bags."

Image source: TSA/Instagram

"These utility knife blades were discovered concealed between a #ScoobyDoo greeting card."

Image source: TSA/Instagram

"These comb-daggers were discovered in carry-on bags at the #Boston Logan International Airport and the Lambert - #StLouis International Airport, respectively."

Image source: TSA/Instagram

"These #batarangs were discovered in a carry-on bag at the #Newark Liberty International Airport."

Image source: TSA/Instagram

"The key to getting through the checkpoint faster is not to have items like this in your carry-on bags."

Image source: TSA/Instagram

"This bejeweled lipstick Taser was discovered [a few months ago] in a carry-on bag at the Detroit (#DTW) International Airport."

Image source: TSA/Instagram

"This cane sword was discovered last week at the #Ontario (#ONT) International Airport in California. Cane swords are discovered on an almost weekly basis at #TSA checkpoints across the nation."

Image source: TSA/Instagram

"8oz canister of bear mace discovered in a carry-on bag at #Newark, #NewJersey’s EWR airport."

Image source: TSA/Instagram

"This pepper spray gun was discovered in a carry-on bag at the #Chicago #OHare International Airport. One 4 ounce container of mace or pepper spray is permitted in checked baggage if it is equipped with a safety mechanism to prevent accidental discharge."

Image source: TSA/Instagram

Check out TSA's Instagram feed to see more.

Each week, TSA also posts on its blog a record of some of the prohibited items that were found. From June 27 through July 2, for example, TSA confiscated 33 firearms, a stun gun cane, octagonal sais, shukos and more.

(H/T: Wired)