Ms. Takahashi makes Ryouga petty, irresponsible, and spiteful.  He's 
tried to kill Ranma innumerable times, and he initially tried to kill 
Ukyou just for being Ranma's friend.  Mr. Crewson makes Ryouga petty, 
irresponsible, and spiteful.  He's tried to kill a number of girls (or at 
least give them AIDS), and he almost kills Miyuki for giving him AIDS.  

 
Petty and irresponsible - yes, spiteful - not really. Whilst Ryouga 
has his character failings, I don't think his character was adherred 
to here. In attacking Ranma, he believed he had just cause and 
attacked openly and honestly. Ryouga would never attack innocents, 
let alone allow his actions to kill in such a dishonest way. His 
honor might not be pristine ( eh, P-chan... ) but this is just too 
far gone. I can understand attacking Miyuki if she gave it to him 
knowingly, but otherwise... 

If Ryouga was to get AIDS, the story seems realistic enough.  Certainly 
interesting.  I mean, Ryouga is shown (by RT) to have homicidal 
tendencies, and he'd take out his anger on someone...

Probably Ranma. " Ranma, you caused this somehow. I'll kill you!!!" 

my gripe is that Ryouga seems too base to do something as subtle as
 sleep with girls after breaking the condom...

It's just not what Ryoga would do.

Cheers.
Martin
 

Computers reduce the amount of guessing a man has to do. 
Then again, so does the bikini.

Unfortunately the remainder of this sig. file has been 
classified TOP SECRET. I mean, I could let you see it,
but then I'd have to kill you.