In a park in Ealing, London (was it Ealing Common?) we came upon this notice:
The arrival and that of their descendant’s have changed the face of Ealing and England forever.
If you look carefully, someone tried to erase the offensive apostrophe.
Someone caught in the act of adding an apostrophe earned himself the epithet of “punctuation hero”. His neighbours weren’t too pleased though. Read all about it in the Mail Online.