Don't look at the small blind as if it exists in a vaccum. Pot odds
, your cards and position should determine your action.
In the small blind you are getting a significant discount on an unraised pot so the pot odds
often favor a call, but it all depends on your game. Some players play rags well, others do not.
It depends on your own game. Though rags rarely hit (thus their moniker) when they do, they are usually worth a good pot because few people put you on the correct hand.
I win more with rags in the blinds then I do with A rags in late postion. They work for me because I play them well. I hate weak A's, no matter what position.
The more limpers there are in a pot, the more I like my rags. Conversely, if there are 6 players seeing a flop, I gotta assume my A is dead.
Of course all of this conversation ignores the rest of the table. In a ring game with aggressive maniacs who raise every A and see every river regardless of price, I'll fold my rags. In tourney play, I'll call every unraised sb unless I'm shortstacked. Well, unraised and any minimum raised preflop action; there is no bet I respect less than the minimum raise preflop, until the blinds are disproportionately large.