ZP's: Are "Two Heroes in the same space" cards worth saving?

[colorado_13]

As a zombie i try to cycle as fast as possible the cards and that seem to work very well. We had an incident in one of the fist games where 2 players stayed 2 turns in "bickering" and "this could be..." and then ended up losing another turn again after a locked door, so now no one ever stays togheter... and Becky is not used very often. I think one of the most common flaws as a zombie player is waiting for the perfect moment to use a card, that makes a huge difference in the long run.