Using rage faces in presentation
TL;DR: If in doubt, leave it out. 

In talks, avoid anything that can offend or be misunderstood, especially if you do not know your audience. It is ok to make self-deprecating jokes, but you want to keep the atmosphere somewhere between serious to light (depending), but outside the sentiment of sadness or anger if you do not have political ambitions. Your "angry faces" may be funny, but never underestimate that they may be misunderstood (including people believing that you did have a fall-out with your friend in the preliminaries of this work - you would be amazed at what people can read wrongly into a throwaway remark).

Myself, I am quite happy use caricatures in talks, but spend time choosing them carefully to help to highlight the scientific point, never on a meta-level. People are busy enough trying to understand what you are doing, do not waste their brain power on issues you think are funny, but irrelevant to the matter at hand. 

But if you think something can backfire, you are probably right. If in doubt, better one caricature/clever idea less.