JJ - Bad check at the river??

[Atropos]

Party Poker 0.50/1 Hold'em (10 handed)

Preflop: Hero is MP1 with J[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/diamond.gif[/img].
UTG calls, UTG+1 folds, UTG+2 calls, <font color="CC3333">Hero raises</font>, MP2 folds, MP3 folds, CO folds, Button folds, SB folds, BB calls, UTG calls, UTG+2 calls.

Flop: (8.50 SB) 8[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/club.gif[/img] <font color="blue">(4 players)</font>
BB checks, <font color="CC3333">UTG bets</font>, UTG+2 calls, <font color="CC3333">Hero raises</font>, BB calls, UTG calls, UTG+2 calls.

Turn: (8.25 BB) 4[img]/images/graemlins/spade.gif[/img] <font color="blue">(4 players)</font>
BB checks, UTG checks, UTG+2 checks, <font color="CC3333">Hero bets</font>, BB calls, UTG calls, UTG+2 calls.

River: (12.25 BB) A[img]/images/graemlins/spade.gif[/img] <font color="blue">(4 players)</font>
BB checks, UTG checks, UTG+2 checks, Hero checks.

Final Pot: 12.25 BB

Well I think until the river there is not much room for fancy ideas, just too many opponents and too strange board.
But what about the river?? The ace comes, so that I now lose to anyone holding that ace, or one of these bd-straight drawers holding a 5...
But normally the straight would bet, as the players at these limit are rather straightforward bad. But I have experienced that someone with the Ace would rather check-call, because he is afraid of anything, because of preflop raise + flop reraise. The question now is should I bet the river to get a weak ace to fold, even if this never happens + maybe collect some bets from someone holding 93o if my jacks are good? Or is the board too scary?