With a standalone app, you've got to worry about things like
8th grader me thought it was the height of comedy to write files with names like "[Teacher name] is dumb" to the desktop.
Any attempt to remove or rename the file using the command line or UI would cause Windows to crap all over itself and crash.
I didn't ask him to, I didn't hire him to, I didn't indicate any desire on my part for him to do so.
So his tweet just randomly showed up without you following him, or without someone you follow retweeting it? I'd contact Twitter, it sounds like you've found a bug.
Replacing TV tuners and Cable boxes should not be what we envision the Internet to become.