This converts a cheap mechanical tally counter into an analog sentiment/like tracker. 

This is by adding a like button that you would glue to the top tab via superglue and also adding a reset shaft blocker so the random public won't be able to as easily reset the counter.

This will not prevent multiple people from pressing the button multiple times, but this is not meant to be a prescriptive sentiment indication, but mostly as a general indication of interest in a cheap and low tech manner.

This is similar to this other design, but with a love heart instead.