This is the thread that has the most coverage of ARGs being splattered over likes...

The "The 13 Oct 21 FT 'Like' Feature - [now restored to prior version]" thread

IB admins have confirmed that the problem exists but they do not intend to invest time and effort to fix it because...

1. The like feature on Flyertalk is unique to this site (when compared to other IB forums) due to historical reasons.
2. The FT like feature is therefore existing technical debt when considered against the other forums IB run and maintain, and making a change to fix this is considered in software engineering terms further debt and hence a poor investment.
3. The bug that causes ARG: and then 4 or 6 to be displayed is visible only to the Liker, no one else sees it.
4. The bug is therefore cosmetic and has no impact to actual functionality, likes are still dispensed, even if likers are left wondering if they need to have an argument with themselves.