Interesting. Would you prefer them to tapped your shoulder and take your hand instead? and how do you communicating with people in public? How do you deal with not being awareness of what is going on around you? I hope you do not mind me asking these questions. I'm willing to learn.
The traditional method of acting as a sighted guide (when a blind person wants it, don't assume they do) is by offering them your elbow, which they will hold onto with their hand and walk a half-step behind you. If you're guiding someone who needs more support (someone elderly, for example) they might hook their arm into yours. If you're guiding a child, holding their hand is usually acceptable. To get my attention, acceptable methods would be tapping my hand, speaking very close to my ear (if I'm wearing my HA, I'll hear you. If I'm not, I'll feel your breath.), or stomping on the floor. When I'm with friends, things like throwing paper is usually okay and taken as good fun, but I wouldn't suggest doing it to a stranger.
In regards to communication, print on palm, as dreama mentioned, is a very good option. In that case, I'll hand you a printed card explaining that I'm deafblind and how to communicate with me, with a chart of each letter of the alphabet and what direction should be used to spell it (such as a straight line down on the left side, then the right side, and then across in the middle for "H", not some variant like straight down, across, straight down)
Then there's the deafblind manual alphabet, which is an adapted manual alphabet meant to be less confusing in tactile form. I hand this card to anyone who I might be communicating with more extensively, but I don't have my pacmate or a terp.
In very quick situations, I have a ring full of communication cards, with letters, numbers, and words printed on them. To use this, the person speaking to me simply places my finger on the letter or word.
My most important tool for communication is a pacmate. A pacmate is a pocket-PC for blind and deafblind people- some models, like mine, have braille displays which make everything 100% accessible to deafblind people. If you own one, you can purchase additional software, called facetoface. This software allows me to give the sighted/hearing person I wish to communicate a small hp ipaq with a collapsable keyboard and instantly have a tty-style conversation with them, without a phone line. This allows me to have long conversations without spending huge amounts of time spelling out words, and I don't have to deal with people who are sloppy in spelling out letters.
Of course, when I'm with deaf people, I can use ASL.
In regards to 'awareness of my surroundings'.. it depends on your perspective, I suppose. One thing I constantly have to remind people is that DeafBlindness is neither deafness or blindness- it is a combined syndrome which creates a very different disability- which is why even mildly hard of hearing blind people or deaf people with slightly low vision can be considered deafblind- because it creates a situation where we cannot compensate for our disability using the other sense.
Getting back to my point.. I interact with my environment in a fashion that may be different than deaf or blind or even sighted hearing people,
but I do interact with the environment in a way that is intense and rich and missing nothing -in my eyes-. I 'hear' and 'see' cars driving with the vibrations of my miniguide. I 'see' sunlight on my skin. I 'hear' words on my fingertips, all over my hands, and sometimes around my body. I 'see' objects in my way through my cane. I 'see' books through braille bumps. I 'hear' and 'see' the train coming from the wind on my skin. I 'hear' a baby cry from the shakes and scrunched-up face. I can 'see' that my food is cooked from the way it steams, the way it feels when moved through a spoon. I 'see' the photographs I take using motion and smell and light. I 'see' and 'hear' the TV shows I so love using braille.
So- I may not be 'aware of what's going on around me' in the
same way you are, I am very much aware of what's going around me all the same.