In an unreasonable manner; contrary to reason; foolishly; excessively; immoderately.

adverb. In an unreasonable manner.

adverb. Of or relating to something that is unreasonable.

adverb. not in a reasonable or intelligent manner

adverb. to a degree that exceeds the bounds or reason or moderation

"Lengthening the term unreasonably, well past the author's death and perhaps for generations (as I have heard proposed), only creates resentment and backlash in the community that desires to appropriate for free."

reasonably  unseasonably