When we have a する verb (e.g. 支{し}度{たく}する、案{あん}内{ない}する、心{しん}配{ぱい}する), is it true that we could optionally insert an を particle in between the noun and the する?

Because in the example sentences [here][1] and [here][2], we can see this usage (the usage of を particle appearing between the noun and the する).

So basically am I right to say that for all する verbs, we can optionally include (or exclude) an を particle in between the noun and the する?

If not, how exactly should we decide whether or not to include that を? I mean I know with a lot of usage we will *just know it*, but are there any rules that we can apply here?


  [1]: http://www.csse.monash.edu.au/~jwb/cgi-bin/wwwjdic.cgi?1MUE%E6%94%AF%E5%BA%A6
  [2]: http://www.csse.monash.edu.au/~jwb/cgi-bin/wwwjdic.cgi?1MUE%E6%A1%88%E5%86%85