If you have to ride with one foot of the curb to provide enough space for motorists to share the lane, then the lane is not wide enough to be safely shared.
If the lane is not wide enough to be safely shared, then you have the right and obligation (to your own safety) to use the full lane, by riding in the center of the lane - between the left and right tire tracks, far enough left to make it clear there is not enough room for another vehicle, except maybe a motorcycle, to squeeze into the lane with you. If they're still squeezing in, you're still too far to the right.
There are three other lanes that can be used to pass you. Imagine how a driver of 15 mph bulldozer might impact the traffic on this road - you have the same right to do so as he does.
Road rage escalated to the point of where actual harm to you might result is possible, but the possibility is very remote. Seems to me the possibility of disaster is much higher if you continue to ride on this road only one foot from the curb.
People might get annoyed and frustrated, but that means they see you, which is a good sign. For the annoyance and frustration to get escalated to the point of real road rage that will actually result in someone intentionally or even inadverdently harming you, is just so unlikely that I would put it out of my mind (like you must put the remote possibility of an airliner falling out of the sky out of your mind every time you board one).
Commit to riding a single block this way, then try two in a row, then three... Like anything new, there is an adjustment period. You'll get used to it. Just keep focusing on the fact that you have the SAME right to travel on that road as any Hummer driver (or any bulldozer driver, whatever works for you), and that you have no safe and reasonable alternative to using the full lane. Learn to use a mirror. If someone is approaching too quickly from the rear, stick out your left arm out and down, palm out. This communicates that you know they are there, that you know what you are doing, that you want them to slow down, and you're not budging. They will simply have to slow down to your speed until they can merge into the adjacent lane to pass you. BFD.
Good luck, and let us know how it goes.
Serge