Thanks for the suggestion. Its a really good idea! I upvoted your post.
There is some potential for "unintentional impact" as far as restricting user participation. A lot of new users start out by commenting on posts to gain recognition/followers/reputation. If they aren't able to comment on other people's posts, then it will be hard for them to work their way up.
I'll add a comment to your post tonight explaining my concern, then add it to the list. I think it should be considered.
[Edit] Your suggestion has been added :)
Thanks Tim, I'd be surprised if even 10% of users actually set their posts' minimum above 25, as we're mostly vexed by a lack of attention, not an excess.
If we think in terms of effort, and pencil in a month of creative writing to get up to 50, then nobody is being excluded from even those 10% of posts except those who've been here less than a month, and those who've abused the privilege.
That's a really good point! You have me convinced :)