And I have encountered obvious instances of these exact same exploits being used AFTER this supposed punitive action!
Are you then accusing Frontier of lying when they said that
- the exploit was fixed
- all modules created by that exploit had been removed from the game
(and furthermore accusing hundreds of players of lying when they confirmed the same)?
I suspect that what you saw was one of:
- someone using a memory hack or similar to give themselves actually undamageable shields (rare, but it happens. One of the types of cheating FDev definitely does act on, so report it!)
- lag (fairly common, I've seen plenty of people I know are honest appear undamageable or at least take far less damage than expected for some time as a result)
- the ridiculously strong shields possible on bigger ships with conventional engineering even with just standard G5 never mind ridiculous god rolls. (common, intended behaviour)
- a similar bug with equivalentish effect is being exploited instead (not impossible, and obviously anyone who finds it is going to keep pretty quiet, but it's still not the "exact same exploit")