I flagged this question about DD-WRT SysLog timestamps for moderation intervention as a cross-posted question.
But the flag was declined by a moderator. Then the question was deleted "for reasons of moderation." This seems disingenuous.
SF deleted it when I checked. No action was needed on SU.
As such, no moderator intervention was needed
While I do sometimes mark flags of that sort as valid, I usually take into account a few things
If there was an overlap in scope, we need to decide which site is a better fit. In this case, its clearly superuser over serverfault.
Secondly, if I actually needed to take action - in this case, the appropriate remedial action would have been on serverfault, where the question would need to be closed/deleted.
As such, the flag wasn't particularly helpful and marked as such.
Disingenious from what side of things? The Super User version of the question you flagged is still here. If the question is why Server Fault deleted it, it would need to be asked of them.
If the question was deleted on Server Fault, but on topic on Super User, at least by the time a moderator saw the flag, then it's a case of "this flag is noise, nothing to do here, dismiss and mark it as declined because a moderator is not required to step in" and that's that reason.
Otherwise if the flag is "this is cross-posted" then you need to include more details or at least an ask of what you want to happen. Do you want us to delete the version on Super User? Do you want us to migrate it to Server Fault so they can combine/merge it with the one there?