There is also the channel Ban Appeal in this forum for this.

I just updated minecraft and I can't play on the server. How I downgrade to 1.7.3 ? Thank you

make a square of lava and protect it with a stone lab then throw your stuff in it

OK thank you and don't worry I wont attempt to do thing like that again...

(cut and paste from other thread) seriously i was tried it for fun and i didnt want to do it seriously cause i saw a video on you tube today i played all the weeks with piston and circuit and i finished my farm of sugar cane and my cobble generator i was planning to do my farm of wheat and cactus seriously we never duplicated item If i wanted really duping item dont you think i sould have tried it monoplayer first? like i said i was testing a lot of thing with piston and having fun making circuit and i apology for this but it was not my intention to dupe cause i knew it was no working anyway