You might want to read about Community Acquired MRSA.
http://www.phac-aspc.gc.ca/id-mi/camrsa-eng.php
http://wwwnc.cdc.gov/eid/article/8/6/01-0313_article
> To estimate the proportion of community-acquired MRSA, we analyzed previous hospitalizations for all MRSA-positive persons in Finland from1997 to 1999 by using data from the National Hospital Discharge Register. Of 526 MRSA-positive persons, 21% had community-acquired MRSA.
Also from the paper you quote: Based on our study, the proportion (21%) of community-acquired MRSA was relatively high in Finland.
Completely untrue. I personally know of 2 incidences: My cousins child carries MRSA. He doesn't get symptoms, but the rest of the family has to be extra diligent about picking it up from him.
The second was a lady I worked with. She got what she thought was a spider bite on her upper leg, somewhat near the groin region. When it wasn't healing and looking worse, she went to the doctor. Turns out, it was MRSA. She had the same misconceptions as you, so she asked the doctor how she could have possibly gotten it. Turns out, in a miriad of ways, but judging by the location she probably had contact with it on her hands, and then touched her leg when she used the restroom. He suspected it got in through a small cut from shaving, actually. I know for a long while, she washed her hands both before and after using the toilet in public, and was on different antibiotics for some time.