It's fine if newbies ask same questions over and over again. What I think is that more senior members can either ignore them and don't answer. This way they have to dig up themselves. If they continue the same question over and over again opening a thread for it, they can be reported to moderator. But what I think is there is no need to show any hostility towards anyone even if it's new member. Remember even the seniors were new at some point. The members are senior here not only because they've got a account here before anyone else but for they possess some good skills which they can utilise in helping others instead of showing hostility towards anyone.
It's not against the rules to ask questions which was already asked and answered. So, there would be no point to report such threads. Yes, we can ignore such questions, but many people still answering - some are just posting for their signature campaign. Others are showing hostility, but still, usually they give correct answer 
i really really hope we newbies can give (-) to users like that. we newbies is trying hard to learn here so please don't make it harder, don't make us give up to learn here. both spammer and bad user who bullied newbies should get some punishment for their bad attitudes. those people who act like a boss, like a master and bullying the newbies are worst, equal to the spammer. 
Newbies also can leave negative feedbacks. But only feedbacks left by DT members affect user trust score. Basically, feedbacks left by you and me have same "power".Personally, I also don't like users who acting like a boss just because that they have high rank. But my point is that should a bit more effort before asking questions. If you know how to use Google, I'm sure you can find answers to some basic questions which we are seeing on bitcointalk daily.
Personally, I've learned almost everything that I know about bitcoin myself without asking many questions. You just need to read, read and read. And repeat it daily.