That still puts them in shaky grounds for it, especially if they've not got a very clear and defined (and bulletproof) data retention policy on them - CCTV has very specific rules to it, and bodycams are not going to be in scope.
Edit: Been and checked.
If an airsoft site is doing any of these:
- Using the body cams as CCTV to monitor members of the public or to identify individuals.
- Using the body cams as CCTV to guard against disorder or to protect individuals from assault, including the use of to try to prevent crime from happening or to provide information about them later.
Anyone wearing one would need to hold an SIA Public Space Surveillance license. I'll take a stab in the dark, that nobody on their team has that.