If done carefully then I do not see any good reason not to (assuming you have a clue what you're doing and aren't a complete moron)
If you have some method of easily/quickly removing your gear from the current path, however (such a removing an inline fuse or removing a ring terminal from the battery post, perhaps?), then certainly it wouldn't be a terrible idea to do so prior to participating in a jump start just to be safe. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif