1 Malaysia, in a pool

I am not trying to be praising myself, but I just have a rather dumb brain to understand maybe...
The question is.....
Why does people wear like they are going to "pasar malam(night market)" when they are swimming in a appropriate swimming pool?

There are notices around the pool stating only those who wore proper swimming attire are allowed, but clearly no one really cares these days....
I mean, why can't they just go get themselves a swim suit? or a swimming trunk?
I waited till I have one before I go ahead and swim, at least i follow the rule, a reasonable rule that is.

The thing about wearing t-shirt + underwear + pants in a swimming pool is that.....
The pool get really dirty real fast! It's like washing your clothes there you idiots....
I was surprised just now how low the visibility in the water was and it really disturbed me, a little bit...

I don't want to be discriminate but, here's the description of the people in the pool just now
There were 3 Chinese including me, all wearing swimming trunks
There were a big group of Malays, the guys were wearing pants  + underwear and the girls were wearing everything they could wear =.=
Same goes to most of the Indian girls in it just now....
But the good sign was, there were some of the Malay and Indian wearing proper attire.....
Why can't the other learn from them?

Why do people wear so much in a pool anyway?
All those clothes actually discomfort me when i wore like such for my snorkeling trips
I just couldn't understand...

Is swimming attire too expensive?
Ah well, if you don't want to spend, please swim in a river...
But with our current economic status as Malaysian, I think maybe some people only able to use their money on food and daily necessity, nothing more than that.....
I am just lucky to be in my family who can afford swimming trunks, so.... I am glad =)

Maybe i am paranoid or being annoyed for nothing...
but, maybe that's me......
I just don't like it that way........

See for yourselves

Hope you get what i mean =.=