I don't know much about federal prosecutions, so can't speculate on that.
Here's a little more about the "pranksters" in an AP story that I guess I can't excerpt:
http://www.ledger-enquirer.com/mld/ledgerenquirer/news/local/14050050.htm
I just think this whole thing is bizarre. Two theater guys from BSC are about the last people I would have guessed to be behind this. My sister went to BSC for a while; beautiful campus, but very, very liberal. Did they just enjoy setting fires or was it the fact that a church was burning that got them excited? Deer hunting, boozing, and theater majors just don't seem to mesh, but who knows.