You may be wondering why we are getting off-topic question more often recently even though now CS.SE exists.
I think part of the reason is that we had done a too good promotion (cannot complain about that :). When someone searches for Googles for "Computer Science Q&A" we are the top result. And as we know, most people don't bother to read the FAQ. In addition the banner that was shown on the top of the page and explained the scope to new users is gone (SE removed that sometime ago from all sites). In short a new user coming from Google may not know about our scope until it is too late.
I don't know if we can do much about this, probably we have to wait until CS.SE takes off (any help in that direction would be appreciated).
If you have any suggestion on what we can do to preempt off-topic questions, please share it below.