I don't know if something can be done, but I will report here my findings...
Already report to the moderators also.

When I saw someone claiming their rank has increased to Full Member in a bounty thread I found that strange!!
(nowadays is practically impossible to rank up)

When I check the merit page I saw that the user has received 73 merit points from the same person...

asche | https://bitcointalk.org/index.php?action=profile;u=1580039
oscar2000 | https://bitcointalk.org/index.php?action=profile;u=377987

In a further analysis, Becassine also received 50 merits from oscar2000 from a normal post.

Becassine | https://bitcointalk.org/index.php?action=profile;u=1224889