These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Dude, Not Funny!: When Hawaiian singer Don Ho passed away, Peter made a joke about his grandkids being "nappy-bottomed Hos" shortly after the Don Imus incident. Needless to say, it didn't go over very well with the audience.
Another example happened after the child air-traffic controller, Peter Sagal listed other times children have controlled air traffic, which included the landing of the US Air flight in the Hudson River.
Mo Rocca had this happen when he once complained about he didn't like hand-knitted sweaters because they literally rubbed him the wrong way. Needless to say, that didn't go well with many knitters; they sent loads of hand-knitted sweaters as a retort.
This actually got followed up on CBS Sunday Morning (Mo Rocca is also a contributor to CBS' 60 Minutes program), where they did a behind-the-scenes of the "controversy".
This later got a callback when Mo recounted the incident and the other panelists started listing things that they "hated."