$20's-HU-Villain pushing in dark-waiting for a better edge??

[nickcee]

Put hand in as example of players I have been coming across lately. This guy has pushed 95% of the time, so he is basically pushing in the dark. Q8s has around 13% edge vs random hand. In these sutuations, can + ev plays be passed up, if so, where do u draw the line. 5%,2%,10% etc.

Full Tilt Poker No-Limit Hold'em Tourney, Big Blind is t160 (2 handed) Hand History converter Courtesy of PokerZion.com

HERO (t9580)
BB (t3920)

Preflop: Hero is Button with 8[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/diamond.gif[/img].
<font color="#CC3333">BB raises to t3920 (All-In)</font>, HERO calls t3760.

Flop: (t7680) 2[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>
.

Turn: (t7680) 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

River: (t7680) J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Final Pot: t7680