jayeff

Apart from anything else, if you actually stick to that rule, I suspect your list will be very short. I'm also interested in what constitutes a "bad attitude"? Would that include someone who wants completion on time; work done to the standard of other designs in your portfolio; reasonably prompt responses to emails or whatever? Seriously, one of the tiresome but unavoidable aspects of dealing with clients is that many will not conform to your ideal profile. The whole point of the cliché "the customer is always right" is that sellers conform to customers' expectations, not the other way around.

It's a sensible aim to seek to cooperate in certain areas with your competitors. As this industry matures, it will surely generate a designers' guild, graphic artists' association, or some such. But I guarantee the first successful organization will focus, not on weeding out dodgy customers, but rather on raising the standards of its members.

Sure you will be caught by a flakey webmaster from time to time. That happens in any busiiness and there are ways a group can limit that somewhat. But right now professional designers (professional anybody come to that) are losing far more money because of webmasters who talk among themselves and sometimes come to the boards after getting p*ssed off with your less-than-professional competitors.