No one, if there was a list of admin-allowed scripts that players were allowed to use, what would they do? I ask this because I play lots of games where there are common scripts that provide information to the player. A similar script for MD might tell you the time left until full APs. Others might automatically map out locations, and so on, while others merely are display enhancers.
However, some are trigger-based, such as, if Change is detected in a location, cast movelock on her instantly (this would be VERY easy to do, unless I'm wrong). It's these that I think are explicitly unfair. (the information ones are very unfair too). In lots of games that I play, player-run guilds and alliances often REQUIRE their members to install such scripts or they're not allowed in, because not having the scripts would put the alliance members at a disadvantage.
Even if that doesn't happen in MD, there will still be the choice that's not a nice choice between using such scripts or not. Say I love combat, but I love the MD interface in it's classical form. Yet I can't compete with other users because they have so much information provided by scripts. So I have to choose between ruining the MD interface that I love and being great at combat, or keeping it as it is and merely being 'good' at combat. Such a choice leaves a bitter taste in my mouth and I'm sure it does for others as well.
Thus the only scripts that I'd want to be allowed would be ones that don't give players an advantage. Scripts like the one Rophs just mentioned would be fine. A script that tells you how many resources are in a particular scene, their regen rate, and when they'll fully regen would be not. (Such a script would likely be difficult/impossible to make now since certain changes were made, but before it was probably much easier).