[vladinecko]

also consider the fact how much stress this would put on the servers. it's not somethint like amazon has, where you rate reviews because each product only gets a few reviews and plus, they have a system in place to handle an enormous load of connections.

so, if a thread has, on average, 40-50 replies, in addition to those server requests that handle new posts, edits or deletions, you'd add an extra request per each post that would get rated.

plus, i think majority people would just ignore the fact such an option even exists. so, you'd end up with a million posts with a note next to each of them saying "0 out of 0 people found this post useful."