Well I personally think they're all doing the sympathy thing, after all how you described Nadia being a sympathy seeker I think Jay is actually doing a good job himself with the old 'let's distance myself from everyone and go into the diary room and tell BB I am ready to leave now because I can't even sit and have a beer near them, but let me sleep on it tonight and get back to you in the morning' attitude, knowing very well he wasn't going to get up and leave BB so close to the end. Jay seems to be playing a good game at the moment as well as the rest. As for Nadia shouting down she mainly provides a chuckle after the shouting down which to me means 'hello im joking', I find the gal completely entertaining, and feel that her and Shell seem to be the only two that don't play up to the camera. Nadia's way of crying because she has no smokes is because she knows very well if she asked out right for smokes BB would say NO, so what's the point.
Cut Nadia some slack and make sure you observe everyone not just the one's you dislike!