I know that account sharing is technically against the TOS, but can anyone comment on the likelihood of getting banned while multi-boxing accounts which you have permission to access? I, for example, am a relatively poor college student (there is no way I could afford keys/monthly fees for 3 accounts), but since both of my roommates play WoW, we thought that tri-boxing would be an interesting experiment. Two of the accounts share the same last name (they are brothers), but I wouldn't want to put their accounts at risk of a ban/suspension, especially given the high visibility of multi-boxing. Does anyone have any experience with this? I have no idea how well-enforced this portion of the TOS is.

Thanks in advance for your input.