I side with never, let people do their own research. And whatever is posted opinion. Might be in favor if it is based solely on statistical analysis.
This prospect list is gunna get done regardless and there will be busts on the list. If an owner or GM drafts based off the list that comes out they won't do well. Good teams do their own scouting.
1- You can do one now (this weekend) and update the list near the draft date. 2- Forum should be inactive once the season ends.