There is an evil invasive plant called Sida rhombifolia that invades local habitats and is obnoxious to pull over here. Guess what shape the leaves are

edit: Acalypha rhomboidea is on the side of justice here though

So long as you don’t wind up with a piece of the alpha-emitter inside you (ex. by eating it, breathing it, introduction via a wound) they are radiologically harmless. Alpha particles are highly charged and comparatively heavy since they have two protons and two neutrons. That mass and charge means that they make a lot of collisions and dump a ton of energy along a short track… VERY short, like the diameter of an individual cell even. Devastating if they are doing that in living tissue due to massive energy deposition all concentrated in a particular area, but on the outside the layers of your skin will adequately protect you. Or, as memes of old have put it:

They are of more concern as like an airborne gas or dusty contamination since you may not be aware if you are breathing them in or accidentally eating traces after touching a innocuous looking dusty surface and not washing your hands before lunch.

A little thought exercise they tell you when you study radiation: if you were to hypothetically have four equivalent activity sources that emitted alpha, beta, gamma and neutron radiation, and you have only four methods of either putting one in your pocket, throwing it in the trash, eating it, or holding it in your hand, which emitter do you match to which method?

Alpha is fine to hold in your hand since your skin will block the alpha particles; you want to avoid eating it because that would really mess you up. Beta has a bit more penetration so you don’t want to have it in your hand but the pocket is relatively fine. Neutron radiation is very penetrating except for moderators similar in mass to neutrons like the hydrogen atoms in water which the neutrons collide with and dump a ton of energy on; unfortunately you are made up of a lot of excellent moderating material where those neutrons would dump a lot of energy in you so you don’t want those anywhere near you and it’s best to throw that source away. Gammas are also highly penetrating so they don’t care that much about small differences like being in your hand or pocket but through having basically no mass and no charge they aren’t particularly likely to interact with you either so all else being equal they’re the safest of the emitters to have inside you if that’s a forced option.

In upstate New York one of my college friends borrowed my car and was driving around with it. My car had a Norwegian flag decoration on it and some guy pumping gas at a gas station mistook it for the Confederate flag, pointed at it and said, “yeah the South will rise again!!!” while my (Asian…) friend was also filling up. When she got back she had a lot of questions for me about what kind of flag it was since she wasn’t familiar with the Norwegian one.

Never ever seen a Nazi flag in person and I’ve lived in the Deep South for about a decade. Confederate ones are super common though, albeit less so than just a few years back.