I remember when I was studying for my CIT test (reading over the staff manual) and found page 103: "...council cannot ban songs." Ah... my group sang every banned song at the top of our lungs in the showerhouse that night. Good memories. Anyway, Hayfever already covered some, and most of them are the same as others':
Titanic, Pink pajamas, Buffalo Song (although not so much anymore), Green Frog (just the 2nd verse, though, again, not so much anymore...)... I can't think of any more.
OK, I lied: Rainbow Made of Children, Suitors, Rose, My Little Pony (I miss Ape), mm-Plucky-Plucky.
Of course, these songs are still in my CIT ntoebook and I plan on teaching them to the CITs thisyear, just to keep them alive.