if u think of it, u guys wont get anywhere spamming them because the people that purchase stickers/logos from them wouldn't believe u guys cuz they would think u stole their stuff..... They would most likely look at u guys as a bunch of kids trying to bring down their name and trying to troll them...... I will definitely say u guys should just hack their ass and shut em down. [just my 2cents]
I personally haven't spammed, I just created one topic explaining what was happening, I refrained from swearing as much as possible.
Now if the people that handle the forum have the same level of ethics than the guy that run this site, yeah we won't go anywhere.
As for us stealing their stuff I could take screens of all the stuff this guy haven't stole and the dates when the files where created, as well as some topics where I share logo packs on RC forums from 2 years ago. As I said the guy that runs that "business" don't even know what he's selling seeing he put stuff from lfs or inaccurate tomodachi stickers I did...
I'm personally not for the hacking thing unless the guy who run the forum is the same than the one who run that sticker site!