With an API that returns the merit data and if the script is only activated when you click on an specific user rather than preloading it for every user on the page, then yes.
The main problem is probably getting the merit data. You would need to make your own scraper to get merit data and then build an API or maybe ask Vod or Loyce for an API.
API probably is best solution, but i was thinking about parsing HTML from user's merit summary page & built a list/dictionary contains total merit sent & count of merit transaction to an user.
Vod & LoyceV are trusted members, but IMO it would be great to remove 3rd party dependency.