The only time I have ever been in a prison was during a foodborne diease outbreak. The particular agent was Clostridium perfringens which casues intense admonial cramping and explosive diarrhea.
The inmates were in no condition to pose any threat, but with 6 to 12 men sharing one toilet the smell was quite overpowering.
One of mankinds greatest accomplishments is the ability to weaponize damn near anything, unfortunately it seems the bad guys excel at it.
I just came to the realization that any time I deal with an Anti argument, all I have to do is refer them to prison videos...
Prisons have a great many craftsman that have no problem fabricating a zip gun. It's easy enough to do
Sent via Mental Power
Criminals can be rather ingenious here is a link to just a few weapons.
15 deadly improvised prison weapons and tools
I don't know about grenades, but we did have an inmate smuggle in a road flare once.
(its called using "the suitcase" by the way)
There was a private prisoner transport company transferring an inmate, they drove a Crown Vic, but it was just a regular one, not a police package, and they just added a simple cage to the back seat. Seems the IM reached between the seat cushions into the trunk since it was just a regular passenger car, and he was able to "suitcase" a road flare. He the lit it in a holding cell, which is where I came in to the story.
And as for the styrofoam cups, it works. I was in an airport security class in the late 1990s and we made a knife from a stack of cups, and also from a roll of plastic trash bags! I saw one made from an MRE bag once. Back when they had dark brown outer bags and green plastic on the inner packages I saw a chess set made from them too. One side brown and one green, including the board.
It seems that the people that want to hurt people can always figure out a way to make a weapon or use something as a weapon.
I got interested and found this on youtube, they make a knife out of a disposable razor. Apparently they let them have them in prison...
Ever get a chance read Concrete Mama and watch the Making The River. Was the prison I worked with Vets at when it was considered one of the most violent places on the planet