[weinzierl]

Please don't shoot at the messenger. costco shared this voluntarily and I can see no bad intention.

We should see it as an opportunity to learn how easy it is to associate different pseudonymous accounts. Nothing drives this point home better than a practical demo.

We can be pretty sure stylometry is used widely by bad actors already and we should not punish people who help to spread the word about these technical possibilities.

[ghaff]

And this is actually quite a simple approach--which is interesting in and of itself. While there would be diminishing returns, there are a ton of other techniques you could use to make stronger inferences about similarity.