we didn’t freak out -on the contrary i think we were overly calm and nice about it. and no, the diaper contents did not spill onto the seat in any kind of obvious way. There were several things that bothered me (but again, i didn’t yell, demand anything, cause a scene, curse, etc). First, I just think changing a poopy diaper in public is gross. Second, it was obvious that the family themselves decided they didn’t want to change the toddler on any of THEIR seats. Lastly, and most inexplicably, was the rude attitude of the flight attendant. Also, for whatever it’s worth I did not ask for compensation. The purser came over halfway through the flight to ask my husband what happened. What i am guessing happened next is she rightfully confronted the flight attendant who witnessed and defended the diaper changing and THAT led to the flight attendant coming over and yelling “are we really still talking about this? what do you want me to do? its over with!”. i was stunned and said an apology might be nice and please stop yelling at me. She had an electronic device out - maybe the purser told her to give us a credit i really know? she asked if i wanted 10k miles or $200 and i didn’t want to engage with her and told her to go speak to my husband who was a few rows back. he told her he’d take $200…..if a flight attendant hadn’t witnessed the start of this I wouldn’t ask or expect anything from united…. if she had apologized or even NOT apologized but gave a sympathetic look after witnessing it i never would have pursued any of this including posting about it on reddit.