Lucifer may have removed those pesky sigils when he took up residence in Sam. Likewise, Castiel for Dean when the former healed the latter at the end of "Swan Song" and it didn't look like hiding out from Heaven would be necessary any longer.

Or the writers may have just forgotten they're supposed to be blinvisible to angels...

Someone please go to a con and ask. If the sigils were removed, it was sloppy of them not to say when.

Also, would they be something Raphael might want to exploit in the war against Cas?

They being the sigils, or the boys?

The boys. Maybe they could be used as leverage. Then again, that might not even occur to another angel, but you'd think that Cas would be notorious for his pet apes.

"The hairless ape has the floor."

Oh, I'm sure he'd be happy to use them however might be most beneficial. Especially after Dean got mouthy with him.

Apparently both the guy who played Kubrick and Genevieve Cortese are on Human Target tonight.

I read that as "the guy who played both Kubrick and Genevieve"

I was wrong about Genevieve. Never trust a spouse who's not obsessive, and who is easily distracted by a pretty brunette.

Michael Massee doesn't play her?

aaaand it's time for bed

Michael Massee will always be Fun Boy to me.