more speakers for rcvr? is this a good idea?

[mr. budget]

I have put 1 set of 12" cerwin vegas on front, 1 set cv 12" on surround, and have the cv matching center on center. It's a rxv650 I have and I can put another set on rear surr and another set on prescence. I wanted to but 2 sets of matching bookshelf (4 of them) and put one on rear surr, and one on prescence. This means the reciever will be driving 9 speakers at once...isn't that too much for a reciever...like I know if I put all four 12" on front (a+b) then it'd be driving a 4 ohm load and if I drove them hard it'd be too much for the amp so how the hell could it drive 9 speakers safely. If I buy those 4 bkslf speaker + another set of 12" 3-ways for spkr b output, I could put them all on and drive the unit with 11 speakers...Isn't that crazy that it would allow me to do that...isn't that way too much for the amp...even 7 speakers properly set seems like it would push it too much,in 7 chnl stereo espcly. Anyway's what's the deal with these prescence out's what the heck does prescence do and why put prescence if it just means more stress on the unit...If I turn the bass down will it help the unit to function when using more than 5.1 because I think the bass requirement stresses the unit. What would happen if I tried to watch top gun with bass and treble high and used fr sur rrsur ctr prsnce (no spkr b), in other words using those 9 channels at levels like 25db and louder with levels turned up for high iompact movies or techno rap music...Would I blow up the amp? Would I blow spkrs, would it distort. Why let me hook up 11 or 9 speakers and then say I could only use half or less the volume...Why isn't their any warning about that...what about using 11 12" or rather11 15" woofers and then turning it to +15...Why doesn't the instr mnl warn not to over load the receiver like that...why is pluto the furthest star?...why isn't pluto a star? what is a semibeigplutonubularsuperconductingsupercolliderde sktopmodularwindowdashboard3of4starbuldozingdinomo rphorobotplantfoodroboticspacerobotcybergenicrobot icdashboardornament4000sp? Have a nice day.
---------------------------------------------------
There's a perfect answer/solution to every problem/question...yeah right