In response to 
Nevermind though, I had a feeling I'd be beaten as I'm not really a programmer.
Here is the bot!
Source: publicdomainpictures.net
And what it looks like:
The famous steem API tool Piston:
Piston Bong by XrNiX (changes made) (CC BY 3.0)
Also a quick and easy way to read through new steemit posts without all the distractions of pictures, reaction-gifs, headers and other styling or waiting for page loading / navigating the website.
It was fun learning to code!
I realise my code is likely unnecessarily unwieldy (it's all on one page) and needs to be refactored for other's sanity. Maybe I could have made better use of Python's inbuilt functions rather than relying on so many regular expressions.
I promise in my next project I will make use of functions and classes.
If you want to point out any glaring errors I'd really appreciate the feedback!
Comments
I try to explain what's going on in most of the code so check it out!
What does it do?
It scans (and displays in the console) newly created posts and searches @bunix's yaCy index for 4 random 'exact phrase' chunks of words. If a search hit comes up, and the author is different, the full content of the posts are compared (minus some formatting). If the match is at least 50% then a comment is made linking to the article and showing the percentage of the match.
What doesn't it do?
Doesn't search the whole web
I realise that a smarter anti-plagiarism bot might search the entire web using Google, Bing, or Faroo thus finding the original source of the content.
But most frustratingly, I just couldn't navigate Google's search API or get any example Python code to work (most written for Python 2.7). Faroo requires manual verification to get access to its API (still waiting for access).
In the end I decided it would be an interesting enough experiment to catch out spammers who copy content from other steemit peers.
Motivations
Although the bounty was certainly one motivation, learning to code has always been on my todo list. Also, I was getting annoyed at the amount of flagrant plagiarism in the new category, so
I learnt how to use regular expressions (a bit) and debug Python errors
Image: Copyright © 2013 by TWiki.org
Resources I used
My reliance on pythex.org was extensive. They make practising regular expressions fun!
Piston, obviously :) thanks to 
IRC freenode #python channel
Requirements
You'll need Python 3, some pip modules (starting with Python 3.4, it is included by default with the Python binary installers) and most importantly Piston.
Note: Starting with Python 3.4, pip is included by default with the Python binary installers.
Bugs
Some random chunks should come up in the search results but don't. I guess it could be with the way yaCy indexes posts but I'm just guessing.
Another bug (albeit a minor one) is when a match is found it will continuously print '.Percentage difference:' which is pretty annoying - anyone know how to fix it?
Also it doesn't shut down cleanly when you exit (ctrl+c) so you need to mash ctrl+c a few times.
I'm sure there are many more that I haven't discovered yet so please make an issue on the GitHub page if you get one!
What's the next project?... an intelligent upvote bot!
I'd like to automate my curation duties using an upvote bot. I really find this AI social media stuff fascinating! If you know of any projects that do this already please shar