The treat of terrorism may very well effect air soft as this nation is on high alert since the Paris attacks.
I myself used to dress up in full militia in enemy uniform whether that be of a ww2 German or insurgent and I even tried to create tactical senecio games based on real life elements.
All in all, you all came here to play a game, we want to keep it fun and not dishonor or discrace people who are putting on all this for show.....ya you all really love your real full metal gear air soft equipment and it doesn't feel cheap except the bright plastic tip on the end of the air soft gun which of course walking around without it might get you arrested or even killed!
Here are some wise words to avoid trouble:
Keep your gear in the case until you are in the venue and never walk out in public!
There are also offensive outfits that might cause offense if not angry stares.
In out door areas there have been situations where some one might wander in or see you, be ready to announce any event so the police will not rush in on a false alarm!
If the terror alert is in fact extremely high it may wise to suspend controversial games and military games.