I tend to watch my language on e-mails, but I also tend to be very specific in my language. I consider I highly critical e-mail to be a business document and correspondence that could be used in court. Against me if I use profanity and threats, for me if I keep it businesslike but firm. Typically it is
Fact
Fact
Fact
What is being done to resolve this?
Why has this not been resolved?
When will this be resolved?
Will this need to be escalated to the next level (as in legal action)?
Etc.
Yet in some places this kind of format is considered violent and threatening.
When my son was in school all correspondence was sent by registered mail, return receipt requested, and at the bottom I cc’d a well known local attorney.
I never actually copied him on it but just seeing his name at the bottom got results.