Ignore and keep on writing
Lets face it, most people writing online are only doing it for a bit of fun. There are not that many around who are really doing it for a living. Yet I am surprised to see just how serious some people take it. I have wrote for Wikinut and some of there members take it all to serious indeed, it sort of takes the fun out of it. I mean there are magazines online who pay good writers a lot of money for articles and other great earning opportunities around.
So why would anyone with any great skill get paid peanuts over at Wikinut. I think these people are not as good as they wish to be, and indirectly take it out on people online. I could see how these people could put some one off, who is experimenting for the first time with writing online. My advice is do not let these people get to you, just keep going and doing your best, you never know it may change your life.