Do you ever fold like this if you have no read on someone?

Calling seems crappy with no read, because then what, c-bet? and if you are called...maybe he floats, or maybe he is smooth calling with AA or a set. And reraising to rep AA/KK gets tricky with no read too.

Party Poker No-Limit Hold'em, $ BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG ($35.60)
Hero ($27.65)
Button ($24.65)
SB ($24.85)
BB ($39.20)

Preflop: Hero is MP with A, K. SB posts a blind of $0.10.
1 fold, Hero raises to $1, 2 folds, BB raises to $2.75.

Final Pot: $4.10