The word obfuscate refers to something made in a hazy way such that understanding it is not easy. When it comes to computing, the meaning is still...
For further actions, you may consider blocking this person and/or reporting abuse
It's generally not a problem that other people can see your software. People can read Harry Potter without it being encoded in base64, but it doesn't mean that many people have tried to pass it off as their own work, and it's kind of the same in software.
Especially true when we're talking about the front end of something, which is useless without the back end - if you're concerned that other people might get ideas from your work, then don't release the back-end code.
On the subject, though, the world would probably be a much better place if people shared their work.