These are all trademarks, many of them registered. You must place (R) for registered and (TM) for non-registered next to the mark when you display it. These lack that. The idea is that if you don't note this, you cannot claim it is a unique and defensible mark. Hence, I'd expect that if using Apple logos in this way gained traction, you'd get some nasty letters, since by definition of trademark law, you must defend the use of your mark, if you want to retain it. That's part of why Apple will sue "Bob's Apple Store" because if they don't seek to enforce their "Apple Store" mark, then anyone else can also use it.
You're not required to use the ® and ™ marks to denote trademarks. Look at the web sites for Apple, Twitter, Facebook, etc. No ®s to be found.
IANAL but as far as I understand it, the purpose of a trademark symbol is to save you from having to send C&Ds to unwitting infringers. Your trademark doesn't lose its status just because you left of the registration symbol.
