QUOTE(ME733 @ Mar 6 2010, 06:57 AM)
.................I THOUGHT that if something was posted on the internet it was , considered public property?.....and the only person/ intenity who could be liable was the ORIGINAL person who did so without ....someones ....permission.
Very common misconception, but much of the material on the internet (just like in printed publications) is subject to copyright laws and people as well as companies get sued every day for inappropriate use or duplication.
Now in most cases with photos, from a practical standpoint, the owner would only come after you if you were using it for commercial gain such as trying to sell prints, use it in a magazine or TV commercial etc. In that case you are directly damaging their income. The big exceptions are when the owner has used a "creative commons" or similar license instead of full copyright, or when the material is truly public domain such as the old historical photos from the National Archives etc.
The best advice is if there is any doubt about posting something on the web that you did not create, either ASK first or just don't do it. The penalties per incident can be outrageous if somebody did really come after you...