A: Well you can… just not until your next turn.

When a player chooses to take either of these Free Actions, the effect is simultaneous with their turn ending immediately. Most notably, this means that if you draw any Creepers with your draws from Swap Plays or Get On With It, you’re stuck with them until your next turn, even if there are conditions which allow you to trash or give them away on your turn. Your turn ended immediately with the draw, so that window is over.

For more info on when you can do what during a Fluxx turn, see the link at the bottom of the right sidebar: Order of Events in a Fluxx Turn