Drifting slightly off topic, but its been mentioned here, is "stolen valour" or "Walting".
In airosft many like to dress and adopt varying forms of military kit, be it out of necessity, (it's practical, comfortable or camouflaged) or because they like it and it looks cool or because they are trying to replicate and exact look or appearance that may have been worn/used in a particular campaign or war.
when people raise the issue of stolen valour or walting, surely the crux of the matter is the context and if the person is trying to pass themselves off as something they're not?
So you could have a 100% authentic WW2 loadout, no one is going to try to accuse you of walting because you're too young?
If you have a US SOCOM type load out, surely people don't think you're trying to pass yourself off as their nations finest if you're from Dudley??!!
but what if its Brit and you could be in the right age bracket? I've seen a guy who had recreated an almost exact replica of a 3 Para MG gunner from Afghan, it was awsome! but he wasn't trying to pass himself off as something he wasn't, it was, in his own way, his tribute to our armed forces, after all, imitation is the most sincere form of flattery.
I say where what you like, its all about the context, if you're wearing it because its cool or because you want to recreate that exact look, fine, but if you're trying to make out you're second man on the balcony, then NO!!!
To give my comments a little context, I served for 23 years.