@m >only 4 freedoms? thats not very much
Yes, more terms can be added like what the "Debian Free Software Guidelines" did, but that just made things more complicated and looser freedom-wise.

>if IP doesn't exist
Copyright exists - it makes no sense to lump that with completely different laws like patents, trade secrets, trademarks etc.

This is required reading to break the proprietary spell; https://www.gnu.org/philosophy/not-ipr.en.html

>i'm just going to ignore YOUR license
I will find out and will sue your ass and you will be ordered to share the source code.