"Linux" is not a valid shorthand for "Ubuntu" when you are saying things like "Linux costs privacy". Using such unannounced "shorthands" makes you appear to be a troll, and because of Poe's Law it is exceedingly difficult to rule out the possibility that trolling is exactly what you are doing.
If you want to avoid these accusations, be clear and either type out Ubuntu instead of saving a single letter by writing Linux, or explicitly announce your "shorthand".
If you want to avoid these accusations, be clear and either type out Ubuntu instead of saving a single letter by writing Linux, or explicitly announce your "shorthand".