Because this is a Symantec site, the advice will obviously be product-centric.
But some things, particularly multiple security suites or AV programs on a computer, are universally (as far as I know) not recommended by the software manufacturers, how-to web sites, or PC advice columnists.
So, lest the impression is given that this is a Symantec-only problem of "doesn't recommend" something with their software, perhaps it should be clearer that nobody recommends certain things?
OK, this is a nit pick.