At the first company I worked at (a semiconductor company) one of the industrial engineers was quite surprised when he saw a job posting for his job on the bulletin board. Sure enough, within 1 hour he was out the door. (Could have put the posting up the day after but I guess it eliminated the awkwardness of his boss having to inform him.)
That sounds like cowardliness to me, but then it’s no different then being informed via email or text message