Ummm, no- but they are the only ones that really scare me
When I was a student at UT Austin I got a job as an assistant in a lab in the physics department- this elevated me to the status of barely noticed peon... I was required to do a lot of machiening work- so I had to learn how to use the milling machiene and lathe.
The 'boss' of the shop was a RABID advocate for texas independence- I spent hours having to listen to him explain how all the problems in Texas would be solved by texas becoming its own nation- he really worried me- especially because, in his free time, he used the equipment to make a totally self built hand gun....