The scares of Halloween 2012 are well past now, but there’s still time for agency IT teams to hear one more tale of technological terror.  For government IT workers, there are few words more spine-tingling than an agency CIO demanding the implementation of a software-as-a-service (SaaS) solution.  Agency IT professionals are hard to frighten, faced as they are with the looming “fiscal cliff” and years of budget cuts, but the dangers inherent in SaaS are enough to turn even the most hardened systems administrator’s hair white.What’s so scary about the big bad SaaS monster?  And is it something that IT teams should bar the proverbial door against,