it could mean that where they’re going or what they’re doing is CLASSIFIED (meaning secret) or that the things they’re doing is/are tied to a particular CLAS(S) of violations
BTW - did you see Lin Wood tweet to Tom Fitton?
It appears that Fitton got something pertaining to Seth Rich that we’d find interesting but never released to public which, Wood called him out on, would seem to go against JW charter.