I wanted to do a comedic gameshow-like thread titled "Who is whose alt?". People had to add a funny theory/proof to their claim (which could be nonsensical), with the final goal of just being funny to read.
Quick example, Yurihater is mylovenovels alt because Yurihater is the Mr. Hyde to mylovenovels Dr. Jekyll. They both live in the same place, which further adds strength to my claim. [further theories and proof here]