I am bit confused, since I am pretty new to this voting system at YC. Unless you have something useful to say for the topic, you just cannot leave a comment saying you like/dislike it?
"Please don't submit comments complaining that a submission is inappropriate
for the site. If you think something is spam or offtopic, flag it by going to
its page and clicking on the "flag" link. (Not all users will see this; there
is a karma threshold.) If you flag something, please don't also comment that
you did."
http://ycombinator.com/newsguidelines.htmlSo another requirement is that humorous antics improve the signal to noise ratio.