I seem to have noticed a bit of a trend where a posted question will very quickly get an answer, but a very poor one. It would seem that some people are "camping", waiting for new questions to be asked, and then jump on them and try to get an answer submitted ASAP, presumably in hopes that it will get marked correct.
Now this would be fine if the answers were correct, but I find that they are often extremely weak answers. And this is just speculation on my part, but it seems like once a question has one response, traffic to it drops dramatically.
I don't really know exactly what to propose about this....it seems there are several issues with undesirable behavior from people trying to gain reputation. I wonder if increasing the weight of downvotes might be the answer, or maybe even making their weight exponential, ie: 1 downvote is no big deal, but 4 downvotes is a very big deal?
My point is to try to do something to get rid of people that are posting answers that are just not very good at all, and they know it, but they are hoping that by having "many lines in the water", they might catch an extra fish here and there. I think this type of behavior should be discouraged on SO.