My patience is at zero

There have been several writers who've submitted queries to QueryShark recently, had the query posted and critiqued, only to ask to take it down shortly thereafter with NO revising.

The value of QueryShark is in the archives, everyone learning from the work of other writers.

It's also a complete waste of my time to critique a query and then have it taken down. Given I spend more than an hour, frequently several, on each entry, you can understand my patience is wearing thing for this kind of thing.

So, help me out.

Do I:

1. Remove the provision that allows writers to remove their work at will?

2. Require that the query be posed for a minimum length of time?

3. Turn off comments for the first week the query is posted?

4. Throw in the towel and let the archives serve their purpose, with no new entries?

5. Something else?

Input needed. Input received. It was VERY helpful, thank you.