So, let me see if I've got this right.
If I download pirated/illegal/illicit software from the interwebs and proceed to install it and give my root password, something bad may happenz?
I can haz malware?
People are morons. Stop downloading and installing pirated/hacked free copies of paid for software and you won't have these problems. Idiots.
The real ignorance is people thinking that just "not clicking" stuff will somehow prevent themselves from getting infected. Anti-virus programs now-a-days are so lightweight and low-impact (read: not resource heavy at all) that it's stupid to not run some kind of AV. They would never notice any performance impact. Idiots.