Isn’t that something done by any group being oppressed and not in power, regardless of what kind of cause they are for?
e.g. those who had capoeira and similar things that had martial arts disguised as other stuff, back when they couldn’t practice partial arts.

Though I find it hard to understand why they still have to wink now, when there are literal state-sanctioned groups of armed people-robbers around, who are also fine getting filmed in the act.
When multiple countries’ governments have switched from turning a blind eye, to actually endorsing such actions, what more are these groups trying to accomplish by using these deniability tactics?