If you want to be thought of as a solid, reliable pillar of your community when you’re 50, you can’t be an irresponsible, corner-cutting exploiter at 25. ... The time to worry about your reputation is before you have one. You determine your reputation by deciding who and what you are and by keeping that lofty vision of yourself in mind, even when you’re having a rip-roaring good time.(1)
I recommend another reading of the above quotation and giving some thought as to how it may apply to one's conduct on Internet social sites.