The accounts here Geoff obviously weren't designed with reselling in mind. With the disk space and bandwidth shared amongst all of them, theoretically any one account could hog all the disk space or bandwidth. However, there is nothing here in the TOS that would prevent letting a friend use a spare domain name slot; and such would be technologically impossible to enforce; and unwise to attempt if it were too. A lot of people like me are on dynamic IPs, or have access to multiple static IPs so no way of knowing from where someone is connecting who they are. And, if I had a domain name of mine managed by someone else acting as webmaster, obviously that person would be uploading files, etc. from their own ISP connection.
Thus, unless you trust this friend completely not the best of ideas to hand over one of your domain slots to him. Worse yet, bandwidth used isn't easily controlled by the webmaster, as that depends on users. Theoretically a malicious user could consume a lot of bandwidth by downloading the same thing over and over from a site. Particularly a concern if you happen to have binaries available to download. I check my domain's bandwidth use *daily* to catch that possibility. Heck, I've yet to have a problem with malicious users, and after checking bandwidth used so far this month, with the new account structure and lower bandwidth allowed, at this rate I may come close to hitting my 2 gig/mo limit here.
As such, unless your friend agrees not to change the password, or has some itsy-bitsy text site where it is almost inconceivable disk space or bandwidth would be an issue, sharing domain slots here may be precarious. The only saving grace here is that unless policy has changed here, accounts aren't shut down immediately if the bandwidth limit is hit before first contacting the owner. I asked once because of that theoretical possibility of a malicious user. If that ever happened, and some yahoo on a cable modem pointed a bot at my site to continuously download, I could take action to deal with it with reasonable promptness. However, I am a mere mortal and do have to do things like sleep or go to work.
