[GraemeL]

It's a political story and is thus likely to be flagged as off-topic by a large number of people.

Unless a political story has a strong tech slant, expect it to disappear off the front page quickly no mater how many upvotes it gets.

[groundlogic]

It was about the Hong Kong police using a new technology (likely "DNA paint") to mark protestors, likely for future prosecution

[GraemeL]

DNA isn't mentioned anywhere in the linked story. It only says blue dye and there is nothing new or technological about that.