Funny to us, but not much if you have to deal with pathetic rats spamming your report queue with complaints that someone is negrating them, expecting you to ban them and then get mad and nag you for telling them to eat shit. Other problem is all those reactions have to be stored in a database somewhere, which gets really annoying really fast when that database is grows to terabyte size and backing it up takes a few dozen hours. Stickers solve the problem Something Awful had with users empty-quoting posts or replying "I agree" and shitting up threads with that, but creates another problem of shitting up your HD space and wasting your time when something crashes or the forum gets corrupted/deleted and you hafta copy all that empty air.