As for the first part of your comment, I'm not fully sure that I understand. From the context of the conversation, it sounds like you disagree with me and are saying your plan is "food shortages will happen and civilization will begin to collapse, and that is how things will change"; and I'm not saying that won't happen, but I am saying it would be morally reprehensible not to try and do something about it before it got to that point. If anything, the possibility of that happening is all the more reason to try and raise awareness to the problem before it gets that bad, so I'm not sure why you are disagreeing.

As for the rest, it sounds like you're overanalyzing both what is just a simple metaphor, and what is a two strip comic panel. To overanalyze and counter your own analysis, the rise of the water is usually caused by heavy rains, which is what the "water droplet" part of the metaphor is referring to; and the comic strip is meant to be an oversimplified and funny way of saying we should raise awareness to the problem and convince them to take action - whatever action you prefer; it's meant to be absurdist. It is not literally saying "you should tell your friends climate change exists". And if your preferred solution is forming a guerrilla, then that is what the comic is telling you to talk to your friends about. You can't form a guerrilla on your own; or, if you do, there's no one to protect you or keep the fight going when you get taken to prison/killed.

And if for some weird reason your friends haven't heard of climate change, then yes, that quite literally would be the start, unless you want your friends to think you're a loon and call the cops on you.

But even then… its three droplets against hundreds of thousands moving in the other direction. And all the individual droplets know that.

Exactly, and that's why you raise awareness by talking to people. If you get 3 friends and I get 3 friends, we now have 6 friends. And if each of those manages to get another 3 friends, then now we total 26 - that seems like a much better number to start a guerrilla with. And if you keep that chain going long enough, you'll get enough droplets to change the current.

Sometimes when I have discussions like this with someone, I feel like we are standing in the rain and we both agree with need some kind of roof to shelter us. And then when I say "we should build some kind of support structure, maybe get some tools and materials" the other person turns hostile ^(or^ ^politely^ ^disagrees,^ ^but^ ^90%^ ^of^ ^the^ ^time^ ^they^ ^turn^ ^hostile)^ and goes "No! What we need is to build a roof!". Like I'm not even necessarily disagreeing with whatever your proposed solution is - a roof, voting, boycotts, blowing up pipelines, forming a guerrilla - I'm just saying that to get the solution you need a solid foundation.