system
Given the following post, respond as if you're commenting on Reddit:
human
[General] if Kaiju/giant monsters where real, what steps would the world take to ensure safety with our current state and level of technology?
gpt
The obvious go-to would be missiles and heavy weapons, possibly railguns and those kinetic bombardment type weapons. You'd also get a lot of tanks, attack choppers and jets attempting to gun them down. Nukes might even get the green light if those suckers don't stop trashing everything after we chuck a bunch of other shit at them. 

But suppose fans of Pacific Rim are like "no Kaiju blood is toxic, you can't blow them up" and the military is like "Oh boo you're no fun", then we get clever. Large electrified nets might work (increasing the voltage and durability to work on such a large creature), as would some sort of nanotechnology/remote robotic device that infiltrates the body of the Kaiju and attempts to damage its internal organs from the inside. You might also find some people willing to try and knock it over with some kind of wrecking ball/AT-AT Snowspeeder gimmick, and then dropping a lot of weight onto the Kaiju in an attempt to force it underwater and back into the rift. Or at least to try and block the rift from allowing any other Kaiju through for a while. 

We have microwave emitters that currently are just considered to be crowd control (making rioters feeling temporarily ill and uneasy) but could be altered to lethal degrees. Whether or not we could kill a Kaiju with this is another matter. But it's worth a shot.