Seeing were now being quite 'literal' and have decided to enter the land of gaga and flights of fancy ... I will indulge.
NRM as an accredited rail transport operator, do not have any statutory rights to prosecute.
They merely make a complaint to ONRSR, who have the power to conduct an investigation.
ONRSR gathers information through their investigate powers under the Act, and prepare a brief of evidence to the DPP.
The DPP reviews what it has and then determines whether it goes off for formal prosecution action.
That is basically what happens with just about 'every' prosecution - so when people say, im going to prosecute you for 'assaulting me', that's the process (as above, but with the police in lieu of ONRSR) that they mean without saying it - individuals never pursue criminal actions in their own right. I don't think the NRM was ever going to 'prosecute' anybody, and I don't think that is what is being said here.
As for people in preservation, Masked Railfan has hit the nail on the head - at one time or another we certainly were all 'overly enthusiastic'. As people grow and gain life experience, they understand why certain things exist and are done a certain way, rather than a 'just do it' philosophy that can come with life inexperience. I think the biggest problem with museums is that snappy attitudes and poor communications can leave people turned off, and they go and decide to do something else leaving the whole preservation movement the worse off, as potentially you could have had one of the best supporters or volunteers just walk off and they aren't coming back.
Nearly 20 years on, I still remember being on the receiving end of 'snappy attitudes' and some pretty poor communications from various persons in the preservation world, that being said - 1) I now work in a position of reasonable seniority with a private operator in the rail industry [so stick to your guns and follow your dreams, if you work hard enough and want something bad enough, you may just get it], and 2) Believe in Karma - what goes around, comes around.