Believe it or not, there are atheists here that compare gods to Bigfoot, fairies, unicorns, leprechauns, Nessie, etc. Shocking, I know.
Now that you've overcome the shock of this news and are settled back down in front of your screen, I have a question...
Personally, I find this to be a logical fallacy: a false analogy, because while there is no objective evidence of their existence, the purposes of these concepts are entirely different. One, in making the analogy, is also applying form to something that doesn't necessarily have form. I also find the comparison rather insulting to those who have had an experience of a god.
So I put it to you. Do you think it's reasonable to compare gods to these creatures? Why or why not?
I think it depends on the context of the comparison, the concept of god in question, and the criteria against which the two are being compared, but generally, I don't think it's reasonable except in highly limited contexts. Those include when someone tries to preach their beliefs to others and makes an argument such as, "There have been many stories about [insert specific supernatural deity concept here], so it must be real." Basically, if an argument used to assert the existence of a specific deity to a non-believer could equally be applied to a cryptid or other non-existent creature, highlighting that could be useful in some contexts, and I don't think it has to be done in an insulting manner (which also depends on reading the room and being aware of other people's sensibilities).
On the other hand, I find the comparison pointless and misplaced in most contexts because god concepts and most people's reasons for believing in them are often heavily intertwined with culture, history, peer and other social dynamics (e.g., growing up in a monotheistic or pantheistic culture), and material conditions such as education and economics, which they have variously influenced (and vice versa) throughout history. This rarely applies to Bigfoot or fairies, at least nowadays, and even when it does, the scope of the influence isn't remotely comparable to that of the numerous god concepts that have helped to shape different cultures and their ethos throughout history, up to and including the present day.