League Debate, Sunday and Monday trades

[MudDawgs4Life 6]

My league is having a debate, people want to be able to trade if games for that weekend have already taken place. For example, this week, a trade on Saturday or Sunday morning would have been fine as long no players who have already gone are involved. Or even a trade at 3:55pm on Sunday that would trade players involved in 4:00pm EST games, Sunday Night games, Monday Night games or bye weeks - again, as long as the players involved haven't played.

 

I know this isn't standard, but can you think of reasons that these trades shouldn't be allowed?