^Mostly true.
To the OP:
Typically, if the package gets caught entering the US, they just confiscate the laser. However, according to the law, by importing the laser you are committing the crime of smuggling, which is a felony. I have never heard of anyone getting more than the laser confiscated, but the government would be perfectly within the law to arrest, fine, and imprison anyone doing this. Just because it has never happened doesn't mean it can't happen.
Again, that's never happened that I know of, and importing one laser is clearly just one for you and would probably not be considered a crime on the level of importing 1000 of the things. But to make informed decisions, you have to be informed. So now you know more about it, and you can go look up all the laws on your own and decide if you want to risk breaking them. It's up to you.
ETA: Also, remember that there are lasers that are perfectly legal to import into the US. Those lasers must be FDA approved, and probably cost more than $50, and probably won't be pen-sized, but they are perfectly-legal IIIb lasers. So you can always go that route.