I wouldn't really say there is anything that I would never enter for but I do stay away from certain sweeps. I steer clear of the ones that ask for your information and then ask for your household income and how many children and stuff like that. Or the ones that want you to pick a few email newsletters or select some interests before submitting an entry. Bellaonline is borderline for me on this respect.
For example,
www.winafreevideo.com or
www.winafreedvd.com....come on, they don't need all that information to enter me in a sweeps. Not even Nabisco asks for that much personal info. I figure most places like this either never really give out the prizes and just want your information to send you a bunch of advertising for stuff you don't want. I know places need to make money to stay afloat but it always makes me wonder about the legitimacy of their sweepstakes. I could be wrong on this, that's just how I perceive them. I also don't do the lotto sweeps either. I never hear of anyone ever winning the big jackpots, so I don't like to waste my time. I have been doing the SurvivorStakes game tho, I really don't know why. Odds of winning are almost nil but I think I just like the way that game is set up and it soothes me watching it...lol I could live without all the advertising. But that's supposedly how they make the money that they give away.....sigh
I dunno, I'm still fairly new to all this sweeping business and haven't quite had enough experience to know which are good ones and which are not. I just don't like how some of the sweeps sponsors set up their entry processes. If its a site that has actual products for sale on their website, I will probably enter. But if all they want to do is show me a bunch of advertising with affiliate links, I usually don't mess with it.