When lieking/haeiting, it's performed through the following URL:
battleofthebits.org/group/HaitLiek/[post number]/[1 or 0]
If the URL submitted is 0, you will haeit a post. If 1, you will liek it. If anything else, you will "nothing" the post - see post 47434 (Lukas' post).
This disregards whether the post is your own, and just applies/removes the liek/haeit/nothing.