let's look at this from an open view:
predictions cost members time and effort, they have to think about your ranks/marks, your school etc. therefore the fact that they are done is due to the generosity and goodwill of the people of these forums.
an overinflated prediction can often lead to complacency and that person will be gravely disappointed when they receive a UAI 10 index points lower than their prediction.
an understated prediction will lead to "sadness, then into a fast, thence to a watch, thence into a weakness, thence to a lightness, and by this declension, into the madness" of depression.
so my 2cents is predictions are not good thing.
predictions cost members time and effort, they have to think about your ranks/marks, your school etc. therefore the fact that they are done is due to the generosity and goodwill of the people of these forums.
an overinflated prediction can often lead to complacency and that person will be gravely disappointed when they receive a UAI 10 index points lower than their prediction.
an understated prediction will lead to "sadness, then into a fast, thence to a watch, thence into a weakness, thence to a lightness, and by this declension, into the madness" of depression.
so my 2cents is predictions are not good thing.