Just smart enough
This seems to target those who are just smart enough to be able to root their phone and allow installs from untrusted sources, but dumb enough to follow any link they're given.
It is unfortunate that these people seem to be in the majority. I, for one, like to keep my phone security turned on and would always recommend that others do to.
Rooting seems trendy, but for the majority of people it's really not a good idea. (see Just smart enough)