Comments here are intended to be a general guide, just a few examples of how to travel more sensitively. They should not be viewed as blueprints for perfect Namibian etiquette. Cultural sensitivity is really a state of mind, not a checklist of behaviour – so here we can only hope to give the sensitive traveller a few pointers in the right direction.
When we travel, we are all in danger of leaving negative impressions with local people whom we meet: by snapping that picture quickly, whilst the subject is not looking; by dressing scantily, offending local sensitivities; or by just brushing aside the feelings of local people, with the high-handed superiority of a rich Westerner. These things are easy to do, in the click of a shutter, or flash of a large dollar bill.
However, you will get the most representative view of Namibia if you cause as little disturbance to the local people as possible. You will never blend in perfectly when you travel – your mere presence there, as an observer, will always change the local events slightly. However, if you try to fit in and show respect for local culture and attitudes, then you may manage to leave positive feelings behind you.
One of the easiest, and most important, ways to do this is with greetings. African societies are rarely as rushed as Western ones. When you first talk to someone, you should greet him or her leisurely. So, for example, if you enter a shop and want some help, do not just ask outright, 'Where can I find ...' That would be rude. Instead you will have a better reception (and better chance of good advice) by saying:
Traveller: 'Good afternoon.'
Namibian: 'Good afternoon.'
Traveller: 'How are you?'
Namibian: 'I am fine, how are you?'
Traveller: 'I am fine, thank you. (pause) Do you know where I can find ...'
This approach goes for anyone – always greet them first. For a better reception still, learn these phrases of greeting in the local language. English-speakers are often lazy about learning languages, and, whilst most Namibians understand English, a greeting given in an appropriate local language will be received with delight. It implies that you are making an effort to learn a little of their language and culture, which is always appreciated.
Very rarely in the town or city you may be approached by someone who doesn't greet you, but tries immediately to sell you something, or hassle you in some way. These people have learned that foreigners aren't used to greetings, and so have adapted their approach accordingly. An effective way to dodge their attentions is to reply to their questions with a formal greeting, and then politely, but firmly, refuse their offer. This is surprisingly effective.
Another part of the normal greeting ritual is handshaking. As elsewhere, you would not normally shake a shop-owner's hand, but you would shake hands with someone to whom you are introduced. Get some practice when you arrive, as there is a gentle, three-part handshake used in southern African which is easily learnt.
Your clothing is an area that can easily give offence. Skimpy, revealing clothing is frowned upon by most Namibians, especially when worn by women. Shorts are fine for the bush or the beach, but dress conservatively and avoid short shorts, especially in the more rural areas. Respectable locals will wear long trousers (men) or long skirts (women).
Photography is a tricky business. Most Namibians will be only too happy to be photographed – provided you ask their permission first. Sign language is fine for this question: just point at your camera, shrug your shoulders, and look quizzical. The problem is that then everyone will smile for you, producing the type of 'posed' photograph which you may not want. However, stay around and chat for five or ten minutes more, and people will get used to your presence, stop posing and you will get more natural shots (a camera with a quiet shutter is a help). Note that care is needed near government buildings, army bases and similar sites of strategic importance. You must ask permission before snapping photographs or you risk people taking offence.
The specific examples above can teach only so much; they are general by their very nature. But wherever you find yourself, if you are polite and considerate to the Namibians you meet, then you will rarely encounter any cultural problems. Watch how they behave and, if you have any doubts about how you should act, then ask someone quietly. They will seldom tell you outright that you are being rude, but they will usually give you good advice on how to make your behaviour more acceptable.