We had this come up in a game, and I'd thought I'd run it by you guys.  Can a character declare an aspect on a person? 

I know that you can maneuver an aspect on a person; then you can tag it and invoke it as much as you want (assuming sticky!).  I know that you can use declaration to state you have a lighter on you, that there's a can of gas right behind the bad guy, etc.

A player wanted to use his Martial Arts stunt to 'declare' that the guy fighting him had a poor fighting technique (and declarations are free actions, right?  So you don't have to even use maneuver!  Ahem).  Then he could tag/invoke it while fighting him.  If it matters, the adversary was just a common thug.  The problem is that allowing characters to declare an aspect on NPC's (and vice versa!) just seems like... a bad idea.  The implications of what could be done are boggling.

For what it's worth, I do believe he got the idea from Diaspora, although I don't know if he had misquoted the rule.

Sorry, newb here.  But my FBI Agent/Son of Ares player wants to always have his bulletproof vest on.  Sure, it counts as Armor 1 or 2.  But am I allowed to compel the armor?  The setting is Los Angeles, and it's the summertime.  Can I give him the aspect of "Tired and Sweaty" because he's been wearing it all day?  What's to prevent all the characters grabbing vests?  (I have a problem with this - you don't see it happen all the time in the books!)  What about other equipment?  Can he, based upon his Resources, get anything he wants?  Also, is it fair to just simply say, "I have a vest" - when another of the characters paid -1 Refresh for the Endurance stunt that gives +1 armor (but only in certain situations)?