I still am barely able to hear anything, the dogs I have are much better at catching someone at the door, but in 99% of the time, I ignore. No one is supposed to be at my front door unless invited by me. Otherwise, I ignore. They can't say that I am being rude or such, being that they already know that I can't hear worth a crap. And in 100% of the time I do answer, it is junk, period. Buy this, buy that, whatever. Don't ever answer the door is a good motto of mine, the same thing w/ my phone too, don't answer. So, I'm lucky if I get a phone call during the week.
A good motto. Don't answer the door, don't answer the phone.
You don't get onto a list of some sort, thus saving you hassle long term, from both. The same thing could also apply to emails, especially junk ones, don't ever, ever, answer them or even respond to them (like the phone), if they know that they got even a response, they'll just pick up the pace and call you even more.
Most important stuff such as papers etc. come in the mail anyways.