The way you act around your peers tells a lot about your character. If you hold a certain position you must show that through your words or actions.
In the long term this will not only allow for people to respect you more, but it will also reflect better on the group you are a part of. Whether that group be the Infinite Flight ATC team, Virtual Airline, Virtual Organization, or just a community.
If you act a certain way you are contributing to that community, without even having to offer anything of value. If that environment is maintained it makes it more fun and interesting.
There are times too be silly and times to be serious, but you must always act professionally.