Boy, this is a run away thread if I ever saw one!
My late two cents. I think a lot of issues discussed here can be dealt with with due disclosure. If anything can lead to potential bias, even remotely, it should be disclosed. Once there, then people have the information to decide how to use the information.
US federal law now mandates that online sources list potential bias such as what is discussed. Look at this good example:
http://www.luminous-landscape.com/about/disclosure.shtml
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Products For Review
Products reviewed on this site are generally on loan from the manufacturer and are returned after testing, though more than a few are purchased outright for testing and then sold afterward. If I find a product of personal interest I will purchase it after testing, usually from a retailer but occasionally from the manufacturer. Wherever I buy it I try and get the best discount that I can, but I always make sure that the price is "reasonable", and not so inexpensive as to be construed as any sort of a bribe.
For the record – I have never been offered any sort of compensation (gift or bribe) for any review or article that I've written, and would, of course, not have accepted one if it had been.
Products on loan, such as cameras and lenses, are returned after the testing period. Software products are not returned, because manufacturers don't want them back. Printers are also not returned, because similarly, manufacturers don't want them back due to the high shipping costs. I therefore keep them for long-term testing and then when they are ready to be replaced with the next and newer version for testing I work with the manufacturer to donate the old model to a local school.
Small accessory items (usually those under $250) are usually kept, since sometimes the cost of shipping them back is disproportionate to their value, and manufacturers usually don't want them returned for this reason. If they interest me I'll continue to use them; if not I give them away to friends.
Products reviewed by contributors are almost always items that they themselves own, since few people receive review samples. If the product is on loan to a submitting reviewer I always find out the nature of that person's relationship with the manufacturer and try and ensure that any claims are reasonable and can be substantiated.
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Travel
I always pay for my own travel and accommodation when going to trade shows. If a visit to a manufacturer is part of a "press junket" with others journalists attending a structured event, I will accept paid airfare, especially when the travel is international.
It is usual for company's hosting a visit to entertain, but in my experience it is always with a budget, and rarely includes excessively expensive restaurants or wine lists. (Those days are long gone).
Other than small items, like branded sweatshirts and caps, I have never been offered a gift by a manufacturer and wouldn't accept one even if it was offered. No cash or any other form of compensation would, of course, ever be accepted."
He goes on list some other items the same way.
What is nice about such disclosures is that if in the process of writing it, the author worries about how he will look, I am sure he will take steps to remedy
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