...They ask the silliest questions that can easily be answered by google and then disappear from the discussion.
In as much as the questions are coming from a newbie it should not be called "silly". Newbie as the name implies should be someone without knowledge of something. I would not advice OP to skip such questions, but rather provide answer to them please. If you think a simple Google search could help, why did the newbies join the forum knowing too well there is a Google.
Google's answers are most times static, such that if you don't understand, you have to continue making countless of searches. But here, if you don't understand, a user will be willing to toe your lane till you understand.
Also, concluding that the newbies disappear after creating a trend is wrong. When I was a newbie, I loved creating many posts. But after creating such posts, I will either not be able to know when there are replies to the topic or the level of the discussion will be higher than my comprehension. Then, I will be reading in background without further contributions.
the one line poster newbie:
The length of post does not define quality. It is this kind of criticism that leads newbies to copying and pasting lengthy posts in order to have quality. Infact, I quote "No newbie is expected to have quality in this forum". If you see one, it is a miracle, appreciate him/her. As you grow in rank and knowledge, you grow in quality as expected in the forum. It is natural.