A previous hand for reference...

Party Poker No-Limit Hold'em, $0.50 BB (6 max, 6 handed) converter

SB ($41.65)
BB ($52.55)
UTG ($127.55)
MP ($22.65)
CO ($49.85)
Fnord ($23.75)

Preflop: Fnord is Button with K, Q.
UTG raises to $1, MP calls $1, CO calls $1, Fnord calls $1, SB folds, BB calls $0.50.

Flop: ($5.25) 5, 3, 9 (5 players)
BB checks, UTG bets $5, MP folds, CO calls $5, Fnord raises to $22.75 (All-In), BB folds, UTG folds, CO calls $17.75.

Turn: ($55.75) 8 (2 players, 1 all-in)

River: ($55.75) A (2 players, 1 all-in)

Final Pot: $55.75

Results in white below:
CO shows Kc 5c (one pair, fives).
Fnord shows Ks Qs (high card, ace).
Outcome: CO wins $55.75.

Now onto the hand in question...

Party Poker No-Limit Hold'em, $0.50 BB (6 max, 5 handed) converter

BB ($36.65)
UTG ($21.20)
MP ($164.10)
Button ($49)
Fnord ($31.40)

Preflop: Fnord is SB with J, J.
UTG folds, MP raises to $1, Button calls $1, Fnord raises to $3, BB calls $2.50, MP calls $2, Button calls $2.

Flop: ($12) T, 3, 5 (4 players)
Fnord bets $10, BB folds, MP calls $10, Button raises to $46 (All-In), Fnord ???

MP is LAgg
Button was CO in previous hand.

LAgg would call pre-flop with just about any two cards. He would call the flop bet with as little as bottom pair.

Call or Fold? Should I be more inclined or less inclined to fold because of LAgg's call?