[lugg]

> what alternative is there to find out who they are?

Whether there is an answer to that or not is irrelevant to the fact the warrant lacks specificity.

Same bullshit was used in the Kim dotcom debacle irrc.

"We're not sure what he's done wrong, but we know hes a bad guy so get every computer and we'll build a case based on what we find."

To give you an example of how stupid this warrant is, and funnily enough answer your question: it's akin to the police confiscating every computer and phone within a 10 mile radius of the riots to check the internet history.