Abandoning Copyrights to Try to Cut Off Termination Rights

Can a copyright assignee cut off an author's termination rights by abandoning the copyrights in a copyrighted work? Can an assignee or grantee circumvent the termination rights by requiring the author to abandon her contingent reversionary rights, or by structuring the grant as a grant for a term of years and requiring the author to abandon the reversion? Because these may appear to be unlikely questions, some context should be added in order to make them seem more likely.