First Name: Lynn
Middle Name: Shu Ying
Last Name: Lam

If there is no Middle Name field, the First Name = Lynn Shu Ying.

More effective if you try to reach them via social media like Twitter or Facebook.

If my memory serves me right,

Only International departure has 2nd security check. Domestic doesn't.
Shaver, by standard protocol is not allowed unless it is those eletronic ones (or overlooked by the officer).

seriously, I witnessed them scanning the luggage but looking side way talking to their co worker. that's how tight the security is. but the 2nd checkpoint is usually much more stricter.

that's what I did ,too.. bring the disposable ones or don't bring at all and get it at the destination as and when required.

Without knowing the exact date, it's hard to say.

but you can get an idea by checking out the various prices from a few airlines in one portal - expedia.com.my

In my experience, NOT always in the middle near the wings.
sometimes before the wings. My last experience, I was assigned last seat all the way at the back, it somehow feels much noisier and vibrated harder during take off and landing. I was wishing to sit in the middle, then.

I supposed everyone is urged to do web check-in because AirAsia says that they will impose RM10 per check-in over the counter.

But if you read the fine print carefully, it only applies to domestic flights.

Any international flight still requires you to get the document checked, at minimal, over the counter. But if you did not do web check in, there should be no fee imposed over you.

So,

if you are flying domestically, please make sure you do web check in AND queue up for baggage drop. If you don't have baggage, you can go directly to the boarding gate with self printed boarding pass.

if you are flying internationally, web check in is still preferred, so that you'll only need to approach Document Check counter (usually not many people) just to be sure your visa is valid and passport is active, just in case.
But if you have luggage, long queue is what you will still have to go through.
In my experience, boarding pass usually is reprinted for you when you are traveling back to Malaysia.

I think anything that you can carry on your shoulder, they don't really check.

I sat at 51 before. other than the take off and landing shakes, louder engine sounds, I think it's still ok. Very near to toilet, convenient. And you can stand up and stretch your legs any time you want.

There are pro and con in the last seats. Save your money.

I believe you need to check them in.

For AirAsiaX, as long as you are not seated at row 51 (last row), I think a typical hand carry case is OK to fit in.

You can only change to the available flight (date and time). If they no longer have 12.50pm flight, obviously you can't change to that time. Make sense?

Subject to availability.

Yes, you can.
I carried my DSLR every time!
Add your charger, power cabling, ipad, compact camera, power bank to the backpack also ok.

On luggage - provided your luggage size meets the spec requirements allowed for hand carry

On Sleeping - there are benches where I have seen people sleeping. There are also couches after first security check-in but usually fully occupied.

If you holds credit cards that allows you access to Plaza Premier Lounge, that will be 'nice to sleep'. I don't have any, so not sure how it looks like.

come out to where?

KLIA2 has 2 security checks.

Yea, the water refill station is extremely rare in KLIA2. Grab one when you see it! There won't be another.

Alternatively, there is a sundry shop that also sells mineral water for RM2.50 or RM3 after the 2nd security check.

Dried food that are packed neatly is ok even to bring onboard, as long as you don't eat it.

As far as I know, there are only 2 type of counters:

1. Drop Bag
2. Document check (without drop bag)

The latter is faster and has a dedicated queue.

No, you don't have to, unless you are asked otherwise.

Below is an excerpt from AirAsia FAQ:

30. Can I go 'straight-to-gate' if I don’t have any check-in baggage & I have already web checked in with a printed boarding pass?

If you have received a boarding pass that states "Proceed direct to Security and Immigration" then you may proceed directly to the checkpoint area before proceeding to the boarding gate. Guests requiring a document check will be advised by means of a notice on the boarding pass. You may proceed to our dedicated document check counters for visa/passport checks.

http://www.airasia.com/my/en/klia2/klia2-faq.page