Apostrophe Protection Society
The Apostrophe Protection Society is a UK society that has "the specific aim of preserving the correct use of this currently much abused punctuation mark". It was founded in 2001 by John Richards, a retired sub-editor, in response to his observations of widespread incorrect use of the apostrophe.
The website includes many examples of apostrophe abuse, but is intended to help correct, rather than chide, offenders. Richards has a standard, polite letter that explains the basic rules for apostrophe use, which he sends to supporters to forward on to offending businesses and other organisations.