When I gank your lane....
Please, for the love of god, go in with me. Unless I'm tower diving a full health enemy or something else blatantly stupid, just help me. The reason I'm ganking your lane is to set YOU forward, and in the process, maybe me. The point of a gank is to make a 1v1 situation into a 2v1 situation, but if I don't get back up, it's basically a 1v1. Some junglers can handle that ez pz, but I'm speaking for the times that arent so pz.
But if you don't go in, and I die in the process, at least think of one thing before you start flaming my ass: did he ping or say he was ganking? If the answer is no, then go ahead, light that fire (but Id suggest you don't). If the answer is yes, then apologize or something. You shoulda been more aware and taken your head outta your ass. The Jungler does NOT HAVE to gank your lane. It helps if he does, but there are 2 other lanes to attend to. Also, the poor guy has to ward and control objectives and shit. For real, one smite could make or break a game. That's a lot of pressure for ANYONE.
Long story short, don't be that asshole who doesn't help your jungler out when he ganks. Don't flame him either if shit goes wrong, because its probably your fault (unless the Jungler didnt ping or REALLY fucked up. Look above for an example). He doesn't need to gank your lane, he has other jobs.