You still haven't addressed my points. People don't know what address it's coming from. Anyone who sends with MyBitcoin is pretty much throwing their money away! You have to be specific with how you are paid. And picking the winner: "my word as a bitcoin user that I will not do you wrong" for picking the winner? O...k...
Thanks, I've updated the info to let the people know they have to use the Bitcoin program to pay. Is that specific enough and easily understood? Let me know.
As for picking the winner I use a random name selector here at
http://primaryschoolict.com/random-name-selector/.
Anymore suggestions? Thank you all for your help.