Thanks for reply VS-LHR, my angle would be that as the information was already in the public domain as you mentioned. A case that the 'confidential information' he/she was alleged to have reproduced could of been reproduced form the public domain and not Ifly - hard to prove otherwise unless it was a a simple ifly cut n paste that's different.
e.g. v-flyer has most information any pax would want these days about routes, catering, a/c etc etc. As it's one of your friends might be worth mentioning to them.
Anyway moving on....