Oomis – I think the litmus test is would you discuss these issues in detail face to face with the opposite gender with whom you were not too familiar?
If you would be embarrassed to do so (and I personally believe that the main participants in a forum within ‘Yeshiva World’ should be) then that shows that the issue is too sensitive to be discussed openly in a way that does not very very subtly cause ‘hirhur’ (inappropriate thoughts).
If so then that is something that will be a problem (albeit to a lesser extent) even on an online forum.