Etiquette firmly opposes both obscene and malicious talk, but this does not imply that speech needs to be restricted by law.
Principles
obscene or → firmly opposed malicious talk
offensive, disturbing, or controversial should be expressed and → and discussed in a appropriate situation civil manner for dealing w/ such ideas
Evaluate / Goal
We definitely don't need to necessarily convert these to conditionals (and there are alternative ways of writing the conditionals that would also be valid).
Let's look for an answer that is scolding someone for being obscene/malicious in any context, scolding someone for being offensive/disturbing/controversial in an inappropriate context or for discussing such stuff in an un-civil manner.
Or we could have an answer condoning the opposite of those behaviors.