sorry for that, i did not check the links, i blindly trusted the site..
here are some more hub softwares, if still interested..
http://www.dslreports.com/faq/6545
i think that Verlihub and YnHub are the most used hub soft..
no offence, but you should use their forums not just point to this topic, if you request a feature in their softwares. i would not like to go to other forums if i have my own feature requests section on my forum..
i think the feature is usable. it will require more hard drive space for hub owners if it is used regularly, but i think some of the owners might risk that.
but of course it need the mentioned restriction to leave message only for registered users, and maybe it needs a time limit also.
now i am writing into the wrong forum also, the feature was rejected for ApexDC..