If the project doesn't actually contain copyrighted code from SnapChat (and it doesn't seem to) then a DMCA takedown notice would be illegitimate and fraudulent.

But a prosecution under the Computer Fraud and Abuse Act would be neither, and far worse for OP.

From a casual glance over the list of cases brought under CFAA[1], that would be completely unheard of, and seems contrary to the spirit of that law. If I'm reading correctly, it hasn't ever been used to punish someone who wrote software, only people who have used software to allegedly exploit servers. Therefore the users of this tool would be at risk, not the author.

[1] http://en.wikipedia.org/wiki/Computer_Fraud_and_Abuse_Act#No...

Excuse me but did you read the README? The author clearly admits to using it: "Since Snapchat imposes few restrictions on what data can be uploaded (i.e., not just images), I've taken to using it as a system to send files to myself and others."

I was only saying that prosecuting him for creating this tool is very different from prosecuting him for using this tool.

Not that that would prevent SnapChat from making one, and GitHub from following along with it. GitHub has a trend of taking down repositories lately...

It's not like they have much choice -- they're bound under the DMCA to do so. In fact, GitHub's probably one of the best companies about this sort of thing with their full transparency.