Whoa! The discussions still going strong here!
Depends on how the Patriot system is set up and used... If it's a stand alone system (only integrated to our own AD system), 100% under our own control, and is used only to defend our own skies, then it's not much different than using any other LR SAM system like the S400 or HQ-9... However if the Patriot system is also linked / integrated to the US AD system (perhaps as part of THAAD) and/or is also used as part of a collective defense (ex to defend Australia) then of course it's no longer 'Bebas Aktif'.. That level of cooperation and integration requires formal alliance between the participants with a clear treaty... which (AFAIK) we are not (..yet or ever..).
Well... at least with regards to their alutsista, they probably truly are the most Non block country in the world..!
For example, they have hardware from Europe (Rafale, Mirage, Jaguar, Hawks), Russia (Migs, Sukhois, Ilyushins), US (Poseidon, Apache, C-17s), Self-made (Tejas, Ballistic Missiles, Nuclear), Israel (UCAVs/UAVs, radars, missiles), etc... They have working military relations (and weapons) with all, but allied to none..
No one is asking the US to sacrifice itself for Asia, and the US won't have to either.. The obligations the US have is to their treaty allies in Asia (such as Japan, Sokor, Taiwan, Phil, Sing, Aus, NZ).. Those are the countries the US have to be prepared to 'sacrifice' for (and vice versa)... If the US wants to assist a non-ally, say Vietnam or RI or Myanmar, then it's not because they are willing to 'sacrifice', but simply to protect its own interests (economic, security, influence, other allies, etc).. We can be friendly with the US of course and also cooperate if it conforms with our strategic interest... but to sacrifice ourselves as missile fodder, or to link our defense solely with the US without any formal defense treaty is a big NO!
I still believe the best way for a country like us (non-aligned, bebas-aktif, no ally) is to diversify our weapons system from multiple suppliers/countries... can't risk putting all in one basket... Unless we can go all the way and become formal allies with someone, only then can we consider single source for all our defense needs... but then there's a real possibility we will become lax and neglect our TNI just like Phil..