Mistake's Using Apostrophe's

Why?  Why do so many people think that adding an s automatically requires the addition of an apostrophe?  It just doesn't make sense.  Plurality and possession are fairly basic writing skills to master.  Still, adding apostrophes to words that are intended to be merely plural seems to be a tremendously widespread problem.

Expert's only what?  What does the expert own only one of?  Possibly an exclamation point.  And that's it, right there: the expert's only exclamation point.  Definitely worthy of a permanent sign, don't you think?  And a lovely sign, too: complete with some simple graphics and a little graffiti.  Nice.

 

I won't go into the superfluous use of quotation marks, but apparently the margarita here has $1,99 Mon to Thurs (or some other days).  But only with your dinner (or something rather unlike a dinner).  To be fair, I'm fairly certain that the writer of this sign may not speak English as a first language.

Orange peel aroma's what?  Aroma?  And it is equally enjoyable on it is own.  Yeeaahhhhh.  And don't get me started on the lack of a terminal comma and the weird sentence fragment that lacks parallel structure.

I'm guessing that the sign writer couldn't recall the spelling rule for changing y to ie when adding s, so he or she just added an apostrophe.  Of course, maybe the writer just doesn't know how to pluralize anything: product wasn't pluralized at all.  Not even incorrectly.