The concern is not so much that. Indeed I wouldnt particularly worry too much either way about being monitored.

The problem is as follows:

- not everyone feels comfortable being monitored

- innocent data (such as porn surfing) can cause serious damage to someone if released in the wrong way/light

- there is the capacity for serious abuse. Someone could get unauthorized access to the system. Or the government could use it to impose censorship etc.

So while the majority have nothing to lose - they also dont have a huge amount to gain (because things like this wouldnt stop malware being a problem as claimed - etc.). On the other hand it would adversely affect a reasonable minority for all sorts of reasons.