If a description of an animal accurately describes a known animal, then why doubt it was an accurate description simply because current beliefs are that dinos lived long before man?
That is just the thing: it is not accurate. The animal could be mammalian or reptilian and between 400 kg and several tonnes. If there was a detailed anatomical picture or description then it might be different.
Second, there are a large number of artifacts that represent dinosaurs. There are paintings on cave walls of dinos. There is pottery with dinos on them. There are footprints of man and dino together.
The artifacts are never anatomically correct and are usually stylised. Often as not they have multiple heads or depict spirits. You'd have to provide specific examples for me to comment any further. There are certain highly dubious examples, eg. the Ica stones, that are obvious forgeries. As to the footprints, I think that you refer to the Paluxy tracks.
http://www.talkorigins.org/faqs/paluxy/mantrack.html
Most creationists acknowledge that these are just eroded dinosaur tracks.
Third, this is a thought that I've been thinking of recently. Everyone has heard of the myth of the "dragons" flying in and snatching people and / or livestock. What IF ... these are real descriptions of pterosaurs?
How do you distinguish factual accounts, from say, the Odessey and its multi-headed creatures? Besides, most dragons are able to talk and breathe fire, which has the odor of myth about it. There is no evidence to suggest that cows, sheep and humans existed at the same time as dinosaurs: they are never found in the same strata, there are no sheep bones found in the fossilsed stomachs of pterosaurs.
NOTE: some are still alive today, in the ocean off Madagascar.
Could you provide a reference?
If this DID occur, what would you expect? Fossils and legends, along with some artifacts that were not destroyed by water.
I'd expect to find mammals and dinsosaurs in the same strata, I'd expect to find fossilised burrows of mammals in the Jurassic. I'd expect to see mammal bones in fossilised dinosaur faeces. And interestingly, you'd expect to see all the dinosaurs "together", rather than separated by 30 odd million years of rock. Some decent artifacts would be good, possibly made out of dinosaur bones.
I've read a book recently (The Great Dinosaur Extinction Controversy). Apparently most scientists have discarded this theory as a probable cause for the extinction of the dinos.
It is still the most favoured theory, and certainly not discarded. There is good evidence for this: the Ir anomaly, shock quartz, the Yucatan crater. Not to say it isn't disputed, of course.
ed. to add
http://www.newscientist.com/hottopics/dinosaurs/bones.jsp
for the blood thing