There are some limited advantages of a heavier wheel, namely more stability and it just makes things smoother. Of course it it then harder to make corrections and if you find yourself going too fast you may not be able to check your speed and crash spectacularly on your way to class…
You may be crazy but you are in good company:p. I was crazy enough to add 3/4 of a pound of lead to my wheel. Here is the thread I started about it.