What Common Agile Mistakes have you experienced?

What Common Agile Mistakes have you experienced?
Do you have a personal story about Common Agile Mistakes?  I'd like to hear your story and suggestions, your experiences. Every February, Boise State University puts on a free Code Camp for students and the public.   I am asking YOU for ideas & personal stories for my 2018 Boise Code Camp presentation "Common Agile Mistakes". I will collect, sort, compile and crunch the common mistakes into some statistics.  I will edit some of the stories into a...