Well most of the time i don't negatively endorse if i don't like a mod, and if its broken/needs work, i just leave a comment and if the modder sees interest/fixes it. then i endorse it. The reason for this is the reasons for negative endorsements are too short and i mean yeah, i could pm the modder but if you've looked at some modders pm boxes there beyond full. and i agree with the OP, negative endorsements ATM are pretty useless. they provide no feedback,constructive criticism, just a polite way of saying "i dont like your mod muggleface >:(". thats my two cents