Eric. most skeptics "believe" nothing. Belief is irrelevant to science. It's about religion. What matters is evidence. And every shred of available evidence points to Rossi's crap as an obvious, blatant, very transparent SCAM.
Apparently no one may avoid belief at some level; just take for example your statement "every shred of available evidence points to Rossi's crap as an obvious" is an example of yours; while I see plenty experimental evidences that isotopic shift is possible for quite low energies and I see no reasons why some Edison/Kulibin/Rossi could not stumble upon some manifestation of this...