A coworker of mine dented the top corner of his iPad 2 the first week he got it, then proceeded to ask me if they'll replace it for the screen bleed. If someone was trying to pull something over your eyes and you knew it was just a scapegoat, how would you feel? I'd feel like they were treating me like an idiot that didn't have eyes to actually see the physical damage. Essentially, just explain to them the situation at hand, that an accident happened and you damaged your iPad. Don't say you'd take it in because of light bleed and "oh wow is that damage? howd that get there?" Hopefully they'll be kind and replace it, worse case scenario is they send you on your way with your damaged iPad...which you can always sell for a lower price, eat the difference and buy another one...if you like it that much.
keep us posted, there have been some success stories with people damaging their ipad and getting one replacement...there have also been stories of people having to pay for the repair/replacement. so you're really 50/50