I hope you change your mind. Thanks for your innovation, creativity and devotion.
For the sake of equanimity, it would be appropriate for members to exercise ultimate control of all their posts. Logically, if this is not the case, then every post should be permanent the moment it is posted.
You've created a really fun spot here. Don't underestimate the atmosphere that YOU provide, and the subsequent comfort zone you provide to members. I can empathize with those who are a little shocked and saddened.
However, my best to you, and deepest respect for your decision. PW