In general, because of international copyright laws, you have to abide by
the laws of where you took the photo as well as the laws applying to where
you're putting the photo (Florida, USA). Otherwise you, and possibly
Wikimedia, are in some trouble.
As to the trademark question, while I don't think we should be hosting
trademarked logos on Commons, I don't think we have or should have a blanket
ban on anything that contains something that may be trademarked. As others
have pointed out, most trademarks are very specific about what they protect,
and it's very hard to avoid trademarked things in the modern world.
It's probably best to bring up a specific example if you have a current real
concern, rather than a hypothetical.
-Matt