About trade hack and stall hack and party hack....
A: They don't exist, there nothing in the packet to do such a thing, this is only a way for a user to start whining to the GM.
GM receive many complaint and then start thinking it true since they aren't necessarily the programmer, then GM send it to korea.
Then the Tech team read that e-mail and tell the GM to $%#&%#?% because it's the most stupid thing they have ever heard of and that if a GM is willing to let another of those $#%?#%? hack account complaint because they did a trade or party with another player, the GM would loose he's job.
If I'm not clear enough.
IT NOT POSSIBLE!
Only data would be the AccountID which is numbers 503055 and that accountID can't be associated with your account name anymore since the last forum update. (finally they fixed it) even though it has been reported many time

But then again that bug before only let your account name accessible and not your password or e-mail address.
So if you want to make your account secure, the best method is that your account name isn't accessible. that a good step but due to silkroad bad security I wouldn't count on that one too much.
Make a new e-mail to have a secure email address and make a secure password.