Bzzzt.
RAD - Random apostrophe disease. The apostrophe is possessive when it precedes "s". For the plural, use only "s" with no apostrophe.
For example: "The drunken, stupid frat rat's embarrassed the entire state" would be incorrect.
"The drunken stupid frat rats embarrassed the entire state" would be correct.
Just sayin'. :)
One of these days there will be armed rebellion against the grammar police.