First of all, I am not a qualified pilot so will not be offering comment on anything I'm not qualified to do. Having read the full thread and having worked with emergency services for 14 years and qualified in matters of crash investigation can I say that the first priority will always be the preservation of life. Yes damage caused by rescuers will often make matters more complicated but no investigator would ever criticise anyone acting in good faith to rescue survivors. Investigators will aways, by careful examination of the damage and witness statements including those from rescuers be able to establish what is impact damage from that of rescue damage. Certainly this is the policy in the UK and I would imagine for the rest of Europe.