Aggressiveness or recklessness?

I'm having some doubts about my general MTT strategy.

I've been playing 1 MTT per day (online or live) on this Vegas trip, and with the exception of the Sunday Party $1m guar (where my dad was sitting next to me sweating me out), I've been taking a relatively high risk aggressive line in a marginal tournament situations. Perhaps way to aggressive.

For example, in Tuesday's Wynn $300+$30 nooner, the following scenario developed:
- 180 runners, top 18 get paid. 130 remaining midway through the 3rd round (100/200 blinds). 130 left in the field, Avg stack ~T$4150. My table has just broken, and I am above avg with ~T$6900.
- I walk over to my new table, notice that I am just about to take the big blind, but don't pull the olde "wander around looking for my table until I just miss the BB".
- I sit down and the old gezzer to my left has a monster ~T$14k stack, and there are a couple of slightly above avg stacks to his left. 3 small stacks are on my immediate right. pfft!
- very first hand, it is folded to the SB who completes. I make it T$800 with K8o which essentially puts SB all in. He grumbles for a couple of seconds before mucking. (...like SB wouldn't have jammed on me with any better hand!!)
- very next hand, it is folded to MP+1 (who is actually a regular from the 20/40, 40/80 LHE games in my local cardroom) who limps with an avg stack. Folded to me in the SB, I make it T$1000 with JcJh because I want to end the hand preflop (MP+1 "knows" that I am not normally a light raiser), and avoid playing a pot out of position with Mr. monster BB. Both muck (although BB grumbled about it)
- very next hand, UTG limps (although I didn't notice..... my sucky observation skills), folded around to me on the button. I make it T$600 with JcJh (yes, identical hands back to back). SB (Monster stack) looks me square in the eye and quickly calls. BB mucks, and UTG calls. (3 players, $T2k pot)
- flop comes: 2s5h6s, SB leads for T$1600, UTG mucks, I jam for T$5300 more, SB calls in less than 3 seconds.

SB struck me as an old geezer who could easily be sick of my raising antics who could be capable of calling my push with an underpair to my JJ (overpair to the board) or any draw. I didn't do the math at the time, but there are 24 ways for 77-TT, 19 ways for AsXs or KsXs. I strongly doubted he would have led at the pot with any better hand (but hell, I had no prior observation of his play).

Anyway, SB's actual hand was As4s and I busted when the Ac hit the turn and I missed the miracle 1 outer on the river.

Should I have taken a more passive line on the flop vs. the big stack at this stage of the MTT?