I knew when I read about this masked vigilante who removes superfluous apostrophes from signs, that he should be recognized in a post on this site. The story also contains several hopeful pleas from ordinary civilians regarding other offending signs that have assaulted them (including some that do not involve punctuation errors). I personally wince but turn away from such mistakes on hand-made signs and in emails but take umbrage with professionally made signs and advertising materials that don’t understand how plurals actually work in English. If one pays for a job, one should be able to expect that the job will be done with competence. As for the authors of ‘free puppy’s’, I absolve you.