It is not somehow more libertarian to use a dull knife than a sharp one. Since our goal is to convince others of our philosophy, it behooves us to use language that does not imply that we are ignorant or uneducated. That is the message that bad spelling or grammar sends, like it or not. If you suck at spelling, use a spell-checker.
The last time I checked, we were not a linguistics movement. Did I miss a meeting?