If it was a normal member of the forum that gave 10 merits to that post, they would be labeled with negative feedback for merit abuse.
"Normal member" - no. Alts sending merits to each other - probably.
Context matters:
https://bitcointalk.org/index.php?topic=5088239May or may not be worth 10 merits, it's up to the sending person. There is no abuse though.