This is something we knew was coming, but it's not specific in any way to Lightning. Any centralised structure serving as a ramp exchanging Bitcoin and fiat will come to a series of realisations:

Think about what happens when that PII is linked to BTC funds in a world where BTC continues to go up and fiat which the majority of people hold goes down, along with an ever-decreasing level of trust in government and an ever-increasing level of stress.

These, and others realisations, in my opinion, will amount to a series of incidents, of which we've already begun to see in the vein of CEX rugpulls over the years, regulatory burdening which Coinbase is beginning to feel, along with Chainalysis and LinkingLion, and now we begin to see with countries making it known they definitely plan to have their hand over any centralised exchange offering a custodial wallet service.

I don't think it's all doom and gloom though, but I do believe there's a harsher fighting period ahead as we disjoin money from state, and as this happens and the general economy goes downhill in fiatland, a lot of people who bought into the KYC nonsense may very well become targets themselves - All it takes is a data breach, internal or external, against that SQL DB that so securely holds all the info mentioned above, and a $5 wrench.

I think BTC will win out, but there will be a period where fiat gasps for air - And that's the most concerning period of all.

In summary, yes, any centralised exchange and its users specifically will become targets, be it in the eyes of government, or in the eyes of thieves and crackers - At least for a period.