It seems to me that this sort of thing is going to set a dangerous precedent. Allowing local authorities to breach their own jurisdictions and national boarders to attempt to locate and arrest suspected criminals based on local laws.
How long will it be before extraditions will start being requested between countries based on breaches of laws those individuals are not subject to?
In this case, it was child pornography but clearly the changes to how these warrants are granted are not going to be explicit to that crime.