Dangerous
I'm surprised the command line in windows respects the return key, that would seem to be a dangerous mistake. Changing text copied to the clipboard is nothing new, I've seen it for years, on more than three different site, usually it's just an attribution as to where the material is from, but sometimes it's been nastier, trying to get me to subscribe to a publication, or a random ad for something else entirely is the worst I've seen.
Still I was smugly thinking to myself, I'd never copy text from the internet to a command line, except, no, actually I have. I played with several Hackintoshes, until I realized as nice as OS X was I wasn't going to pay through the nose to be a customer and Apple didn't want me as one. Their hardware's lovely, but why can't they put out anything affordably priced for the spec? Then I remembered trying to get Linux to work. Everything's fine, and each time you try it it looks like they really have made it into a functional OS this time that one could get day to day work done on, and then you run into that essential piece of hardware you need, that simply won't function, but it's kindof like this other one, so maybe if you download this development software and a compiler you could compile your own driver and get it working. Of course you can't do any of this graphically Linux programmers are fucking machoists that love obscure commands and flags. And sometimes there's a guide that almost does what you need, but it's incomplete or you need another version of a program and Linux is simply fucking hell. And yes I've copy pasted commands from the internet into a terminal as root in Linux, although only reviewing them so that I had a fair understanding of them.
Thus the only way I've found to get a functional Linux system is buy it from a system integrator who charges a premium for a working system, System 7, Dell, or one can waste their time obsessing over every little component of the system and ensuring it has bonified open source 'cred, or simply run it in a VM on Windows. In such cases Linux can be reasonably pleasant and functional.
So in short I could have fallen victim to this attack. Now I'll know to copy and paste everything to a simple text editor such as Notepad in Windows, which at least with the example, shows me the attack version.