In the complaint, DMDK said "defamatory posts", including caricatures and snippets, against Vijayakanth were spreading in social media sites like Facebook, Twitter, and Whatsapp.
Such activities were being done with ulterior motives to tarnish the DMDK chief's image by persons including some ruling AIADMK functionaries, it was alleged.
Although complaint was lodged against a Mettupalayam based AIADMK functionary, no action was taken, it claimed.
Action should hence be taken to remove such objectionable content and against those behind it, the party said.