DMCA is basically Copyright Law. A DMCA Takedown means that someone claims that you're content is violating their copyright and thus must be taken down. The process took a long time (years) and don't end very well.
Programming mod? I dunno. I'm not into mods, just some useful tools that automate certain process (like MCEdit filters or functions generator).
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I'm a programmer. I use C/C++, BASIC, Assembly, and Python. If i sound too technicial, that's because it's the way i think.