There are no rules over the Internet, but here are 3 topics you should never talk about over the internet.
Number 3: Never talk about the gender issues. If you talk about differences between male and female, you will get feminist's protest; If you say there are two genders, male and female, you will get queer reactions.
Number 2: never talk about your work and your coworkers. One famous example is Heather Armstrong. She blogged about her company and coworkers in a less-than-flattering manner. Next day, she was fired.
Therefore, don't talk about anything about your work and your colleagues. if you really want to say something like " they are wonderful". That is all.
Number 1: Never talk bad about any crazy religious nuts, especially their holy "God". If you really mess up with their religions, they will kill you.
What my friend Sunny say in a humorist way, is true and especial if it is on FARCEBOOK