You really do not have to worry much about mining in any High Sec regardless (0.5+). There is the same risk in any of them. If someone was going to gank you and you are one to not fall for the can flipping tricks (that is assuming even if you use them), then they will most likely suicide gank you. At this point it doesnt matter which high sec you are in, if they want you dead and know what they are doing, they will get you.

I mine in a .5 system when i play, i rarely run into people. However i usually have a Domi and Cloaked falcon near by for protection and threat projection. When someone that looks like a threat comes near my toons, i will usually decloak and recloak the falcon. They will usually leave.

Only risk comes when entering Lowsec and null, which the roids are usually better, but are usually rougher as someones always looking for a fight in lowsec and null.

Generally a way to keep someone from ganking you is to move systems every now and then, that way your not always in the same spot. I usually base out of a central system. that is close to lowsec (where my Rorqual and Carriers are based out of), near ICE so i can mine that for a change of scenery, and near a few systems that have several belts. With the recent changes you used to be able to hide gear in an orca so it couldnt be scanned out for evaluating targets. Now it can be.