Usernames
I used to work in a department where first initial surname was the standard for email addresses. Several ladies fell foul of this when getting married and protested vociferously about their new emails. Mrs Lavery (first initial S) got off lightly, Mrs Laycock (first initial P) was the butt of a lot of bad jokes, but I did feel sorry for Mrs Lapper (first initial S) who took it all very personally and left about 6 months later.