Here we go again. This same question crops up every often and always provokes extreme responses from either side of the argument. Personally, it doesn't bother me, although we don't take our dog out to cafes or restaurants unless we cannot avoid it - for instance, if we are travelling in our motorhome, and then we would try to pick places which have outside seating wherever possible. I would never dream of letting him sit on seats, be fed from the table or bother other customers. Not dog owners are like those you've described.