Subverting GPL

I have a few ideas, how legal are these:
1. submitting code requiring a 1000$ compiler or 1000$ language docs
2. submitting asm code as "source"
3. making deliberate errors in code or inserting bugs.
4. altering source code to make it look like line noise.
Not that i like to do any of this, just checking what is possible to do with my code.

The GPLv4 will state that the covered code must be at a distance of at least 1m from the closest incompatibly-licensed source.