Why not a tasting session where the taster gets to compare a Porterhouse brew, the commercial/macro version they are "copying", and something in the same style from an ICB brewer? Might be too easy for ICB folks, but if Joe Public was involved, it ought to give the Porterhouse the chance to reinforce the fact their beers are superior, and ICB to introduce the idea that it's possible to make something even better yourself (with a bit of practice).
I know this could open up issues if the macro version were explicitly named (and we all know the PH have skirted that issue closely enough in the past) so it may not be a go-er. But, if it's a blind tasting, the samples would be poured out of sight anyway.
Just an idea...like the foodie suggestions from earlier in the thread BTW.
Cheers, bighair