let me give you an example of my sister's friends .....
they went in to KL, like many Singaporeans did to take advantage
of the weak ringgit ...
were eating placidly at a fast food joint, when this lone,
non-descript man walked up to their table and said
"now I know you guys are Singaporeans, I don't like you guys
coming here. Before finishing your meal, you're to leave 100
ringgit each on the table. I have friends waiting outside." and he
sat down at an opposite table .....
if it were you .... what would you do ? ....
frankly, I dunno how cassie's managed to survive there alone
unscathed till now ... 
When I go there on business trips alone, I dress like the locals
and speak like them and for transport I only use the cab driver I
have established a good relationship with.
Seriously I don't mind paying more for safety