Firstly, I've been looking at some questions with broken tags recently. Take a look at What is the difference between Platform-Independent and Cross-Platform? for example. The question is about terminology and has absolutely nothing to do with C, C++, or Java, and I re-tagged it as such, and left a nice reasonable comment, but the author has tagged it back, because he added them to get a bigger audience. This is not the only question where the questioner has added more tags just to attract more attention and admitted to it in the comments on the question. I don't know if I've just noticed more recently, but it seems like this kind of thing is on the significant increase.
This also decreases the utility of the favourite tags feature. I make heavy use of it and I personally find it very irritating to click on a question tagged with my interested tags only to find that actually it has absolutely nothing to do with my interested tags. Normally I just edit them out, but if the author edits them back in, then I don't really know what to do. The questions don't normally deserve closing and I've never seen a question have it's tags locked.
I feel that these two issues are degrading the signal-to-noise ratio. People are doing whatever they can to get more attention for their questions, regardless of whether or not other people actually want to see them.
Should I just get more aggressive about flagging for moderation?
Edit: Not that I'm not sympathetic about having a question with no answer that you can't solve and being stuck waiting for one. I've got my own unanswered questions. I'm just not the guy to be asking about your Android problems.