My pet peeve is putting more than one name in the first name field.
Wiki-Tree is a database. Each profile is a "Record", each record is composed of "Fields", each field contains information. Computers are dumb animals. They can't distinguish "John Paul" from "John" + "Paul" ( the middle name field) so when it looks for matches "John Paul" doesn't match "John "Paul" So, now you have 2 separate profiles for John Paul Jones. I was told by some one the French naming conventions dictate other wise. But the computer doesn't care. That's why when there is more than one name in the first name field, you have to tell it to save anyway.
Maybe if someone that controls the "Forms" section of the database could move the "Middle Name" Field and the "Nickname" field under the "First Name" Field, it would be easier to enter data and prevent duplications.
My other pet peeve in this case is extra Capital letters in Surnames. The computer does not see "Lejeune" or Le Jeune, or "LeJeune" as the same name. Hence, more duplicates and more merges. The binary code that the computer uses is not the same for "a " as the code for "A". It does see letters only "1" or "0".
One last thing: sticking French vowels into names also confuses the computer.
Sorry, but I spent thirty years repairing computers and I know how stupid they are.