Yes, I can see how a joking mention that "I secured a position in a company buy sending the cofounders nude pictures" can be considered controversial and unacceptable...
in rural Utah, that is. Comedians, from Lenny Bruce to Carlin have used far more controversial stuff --are we, tech people as a group more backwards than the 60's and 70's people that persecuted them?
(That he wasn't a comedian is not a reason to not allow the guy his joke. Or, are there levels of humor only allowable to comedians? I'd take my conferences with any grain of humor one would like to put in them, thank you).
Seriously (or maybe not), humor has to be judged for what it is, not as a manifesto or an agenda.
For example, your "Proposal to make unittest2 more accurate". People could take offense to that, especially if it was presented at a conference "what's with the profanity", "where's his professionalism" etc. You would consider that justified?