No rules against that.
Terraria Community Forums
LoveSpreader
MiltVala
But necro'ing threads made in October about "how to beat dis boss" and "what do you like....." is taking it a bit far. Considering one was answered already and ended up locked.
LoveSpreader
You have the "report and move on" to thank for that. 
MiltVala
But as you said, no rule violations.
I'm what we call "making a joke"
I'm what we call "making a joke"