Interestingly, the amount of "new players - good / bad" arguments are constantly increasing on the forums. A lot of thought is being put into it and a little change can be observed.
If you really look at it from a side, Tremulous is even more arrogant, aggressive, and repellent game than Q3 or even WolfET. And its quite obvious why it is so, just because that in Q3 and WolfET all newbie player knows by default, that shooting their players is bad, just by instinct of "this thing does not attack me - then it is on my side". In tremulous a newbie player can damage gameplay by simply dieing a lot, feeding some pro player, or when he has already been pissed off by not being able to kill anyone, he tries to understand ckit, and then gets kick/ban from the administrator for noob building.
2 most distinctive features of Tremulous are RTS part of the game and aliens. None of them are newbie-friendly and in addition to the community, which is fed up by this irrogance and which cannot be able to distinguish between a deconner and just a newbie... just makes the newbie income drop nearly to 0.
Tremulous is proud to be based on a teamwork, but does that really work? WolfET is a teamwork game, and surprisingly players do teamwork, even newbies, somehow, someway but they do achieve the targets and play different classes. They cannot damage the gameplay but just not being able to kill a guy with 30 rounds from 10 feet distance.
Personally, when I first joined a server, and was cooperating with another builder (newbie as well) to move OM, we both got a ban for 1 month due to a move during the planned rush...
Anyway... back on topic.. dugged..