Back in the vB days, lynee was the one who used to play with SQL queries now we have you on xenforo :D All good, when you have time please share your resources.
We have made changes to the reaction to make it as private, the comments should be private as well to make it like a reputation system.
<xf:if is="$xf.visitor.user_id == $content.user_id">
</xf:if>