It is really only needed when someone complains about a rule violation using I to talk to admins only. The admin should then stop playing and watch the offender and the complaintant (for false complaints of course). In my opinion this goes along with being an admin. If they don't want to do this because they are too busy enjoying the game, then maybe they are not wanting to be an admin for the right reasons. Just my opinion remember.
Recently I have been using I chat about team wounding. One day I used it 3 times on the same guy and nothing was ever done, even tho i saw 3 admins using pink text talking about stuff that really is not important or stuff that should be in pink text.