I wouldn’t like it, but it’s not really possible to shorten the name I am known by (my middle name).
It annoys me when people shorten my sons’ names, but it doesn’t bother them.
I’m interested in names, and like to read any Births columns that list the baby names - the Telegraph, fo example. I’m surprised by how many people use diminutives as given names, such as Alfie, Charlie, even Joey. Not so many girls’ names, but I have known an Annie. I always imagine how a name is going to sound when read out at their graduation or wedding.