Sorry about the away time. I was, uh, "resolving" my computer time, so to speak.
Basically, one of the main answers I see is to think outside the box and eliminate the source(s) of noobs. SRB2, I'm sure, has been hosted many places, and advertised in even more. The game feeds on all places that show that SRB2 exists and is a game that you will like. If noobs dominate those communities, then that's what we're being fed. If that's the case, the creator (SSNTails and/or Sonikku, whom is currently nonexistant) or a staff member of SRB2 can request that the webmaster of that site to take SRB2 off of there. If they do, the income of noobs should be lessened. If not, well, it was worth a shot.
Second, there are the "minor" sources, those being the people who advertise SRB2 or directly tell about it to their friends. These are obviously small problems, but they add up phenomenally when there's a lot of them. Since most of these people are noobs, it's a safe guess that the audience that looks at their advertisements or talks to them are noobs too. Trying to get rid all of the sig ads and such that only idiots see by, I dunno, contacting the webmaster or whatever, would clearly be a waste of time. Instead, we'd have to keep more from popping up and getting to the wrong public. How we do that is simple, but tricky. We just disencourage those people to play SRB2's master server. There are a couple ways of doing this.
The first way, is for us to neglect his idiocy. If the community is supplied with netgames by responsible hosts, the noob will be kicked out of the netgame whenever demanding that they "add sms", "startrings plz", or "gravity 0"; if the community as a whole is smart, then whatever dumbassery the noob commits on his own server, people aren't going to like, and they're going to leave. Undoubtedly, the noob isn't going to tell others what a great online game SRB2 is. If everybody's roleplaying or chatting or whatever lame crap the noobs would be interested in, then SRB2 is pretty much a haven for lamers, and they'll likely tell others about it.
Of course, there mostly consists of noobs on the master server, so that plan doesn't seem to work. So, onto the second way of resolving noob income. If none of the above is to be done, then at the VERY LEAST, remove the info from the main page that you can netgame, and/or erase the location of the master server given in SRB2. We know that the noobs are commonly lazy as freakin' hell, so they won't bother looking at the wiki, and maybe not the forums either, for the master server url. Or better yet, they might not even know about netplay. Doing this, I think, will eliminate a lot of trouble; noobs mostly hear about wads and console from other SRB2 users during netplay. If they don't even know about netplay, then we've skipped through crappy servers, overflowed coop servers, "how do u add wads", "add sms", at least 40 times for a year onwards. They may ask for the server address on the MB. Hopefully, if the server address is up as a forum sticky or something, we won't give them it, and they'll be banned from the MB and still not know how to go onto netgames. Since most online noobs are here for mostly multiplayer, eliminating that from them pretty much kills their interest in SRB2 as a whole. For the noobs who still figured out how to play online, it will still help lessen the difficulty of the "first way" mentioned.
Personally, I don't think it's just the admins that should be trying better the community. Everyone should give their input and ideas if they want better netgames. The negative "Okay, but the noobs will still keep coming" comment, however, is not what I'd consider input unless a valid reason is given.
Oh, and speaking of "everyone", another idea I had on decreasing noobism: don't answer stupid questions on the forums. Don't even tell them to look at the wiki. Leave the number of replies to 0, and let the admins kill the topic off. We aren't helping the community by aiding noobs on something they clearly didn't bother to look up. So try not to give into your kind side.