Re: "yo FYI you're currently logged in to Gmail"
Same here.
The other things I find irritating are those lazy twits that insist on using "ur" instead of "you're", typing everything lower case and leaving out apostrophes.
Arghh...
A tech support twit at a former employer used to send out tech notes using the "tricks" I mentioned above. Just for fun I would correct all his typos, insert appropriate notes and do a reply-all.