I don't know why personal conscience makes emulators ok to toucharcade. If you don't own a legal copy of the game then it's illegal to download. Just because you don't feel bad about it doesn't mean it's not pirating. Obviously, you aren't going to get in legal trouble for it and you aren't necessarily hurting any developers but the same can be said about pirating games that are on the appstore. I don't have a problem with it but toucharcade is a little hypocritical.
I also see no issue with people playing games they bought in their youth or have in a cupboard somewhere, normally people use emulators for the nostalgia value.
I don't mean to sound bitter, cold, or cruel, but I am, so that's how it comes out