In this situation it's not as much a question of personal ideology as it is basic interpersonal skills. You generally avoid telling the world you're happy someone's gone immediately following their death. It's completely arbitrary, and no one's going to throw you in jail if you do it but it's just one of these things.

How you think software should be developed doesn't really come into at this level. It's just a question of how you deal with people and that's where Stallman's fallen short here.