OK, that's no problem. I'm just thinking you could buy 1000, sign up and then sell, which I guess is not an issue. If you are not professional and sincere with your actions, you can always be removed. I was just wondering why you would even require the block quote when you wouldn't really enforce those block be frozen after you signed up? I'm willing to do whatever it takes to get into an areas with like minded folks that wish only the best for this tech and to engage in healthy constructive conversation. I signed up on slack and it looks pretty cool.
I have a spreadsheet set up that allows the moderators to easily monitor balances of verified addresses.
Thus, if someone does as you say and buys 1000 tokens to get into the private group and then sells those tokens, I and the other moderators will notice and remove that person from the private group.