Even after they have become common citizens they are still acting like royal family. Even media is going after them all the time.

What kinda stupid question is this? They will act whatever way they want to act.
Even bahun, chettris and jana jaatis refer to themselves in the royal pronoun thesedays. Your question should be why are non royals acting like royalty by copying royal language like aaisyosh, garisyosh, marji hosh, khaisyosh.

Kiddo: U gotta be royal to feel royal,
Royal stag can't trigger your royalty neither can black lebel