This is a good example of how copyright’s continuing obsession with ownership and control of digital material is warping the entire legal system in the EU. What was supposed to be simply a fair way of rewarding creators has resulted in a monstrous system of routine government surveillance carried out on hundreds of millions of innocent people just in case they copy a digital file.
Any work you create is probably under copyright automatically, if your country is party to the Berne convention.
In Germany only stuff that has a certain level of creativity (Schöpfungshöhe) can be under copyright.
And how is that determined? I found the shit that I took this morning immensely creative.
It needs a certain level of individuality and personality of the creator that sets it apart from other, already existing works of art.
https://en.m.wikipedia.org/wiki/Threshold_of_originality
Would that be a way - have lots of your self created stuff on any device and then sue the corpos or sth for gaining illegal access to copyrighted materials in case they search it?
For personal things, computer, phones, etc. Big corpos cover this by a EULA. EULAs also covers forums controlled by the companies. For public places like websites, you can control search engines by using a robot.txt file.