@Tech Freak: my website isn't meant as a scientific essay with footnotes for everything; it's simply meant to provide easy and effective how-to's. Which I've tested myself first.
Those how-to's are based on my personal experience, during a decade of fulltime Linux desktop use. My approach is (nearly) always conservative and prudent; stability first. That's the only guarantee you have.
On my website, I share my knowledge and experience. If people wish to profit from that, they are free to do so. And they're equally free to disregard it, of course. As you said: it's everyone's own system, own machine, own decision. No hard feelings either way.
Neither do I pretend to spread absolute wisdom and absolute truth. In order to make that quite clear, I've placed this link on all of my web pages: https://sites.google.com/site/easylinux ... disclaimer
Now that's out of the way, let me address some of the things you say about antivirus in Linux.
And why would the "official" software source be safe? Just remember that hack on the Mint servers few months ago...
That's comparing apples and oranges. That website hack of Linux Mint did not concern the repo's. Entirely different kettle of fish.
checking your files before sending them to a Windows user prevent spreading viruses and avoids getting blamed for infecting your friends Windows system (and beside that giving Linux a bad name, do the math).
In the link I gave, I address that (sections b and c). For clarity's sake (others read this as well), I'll copy/paste the entire fragment:
Misconception: protection of Windows users
4. Occasionally somebody proclaims the following misconception: "I use antivirus in Linux, so that I can't accidentally pass on a Windows virus to a Windows user. For example by e-mail attachments".
This is a misconception because of the following reasons:
a. Running antivirus in Linux is a useless waste of system resources. Resources that can be put to better use, for example making your system more responsive.
One of the advantages of running Linux is not having to weigh down your system with antivirus. It would be rather counterproductive to move to a virus-free operating system, if we end up running all of the antivirus crud anyway...
And it adds insult to injury, to do so for the sake of an operating system whose owner actually chooses to let it be security-deficient.
If a Windows user can't be bothered to guard his own system against threats that are the result of shortcomings in his own operating system, then the efforts of the comparatively small base of Linux users aren't going to make a shred of difference. Such a Windows user will unavoidably get infected from somewhere else.
In fact, I believe that Windows has to lie in the bed it makes for itself. I'm not trying to be harsh here: it's more the principle that consequences must fall to the appropriate party, or else there is no incentive for change.
Therefore, unless a Linux user is running a public web/mail/file server (clearly not your average user), I strongly discourage the installation of antivirus, because doing so continues to silently endorse one of the worst aspects of operating system design.
In fact, you'll find that the "protection of Windows users" fallacy is sometimes used as an excuse, by people who irrationally can't believe that Linux really doesn't need antivirus for itself....
(With thanks to DuckHook from Ubuntuforums.org, for kindly allowing the use of this text)
b. If you want to reduce the chance of passing on a Windows virus by e-mail, than you can achieve that by sending e-mails with attachments by means of Gmail.
Then Google automatically scans the attachments for viruses, trojans and other malware. With a professional up to date virus scanner, on the servers of Gmail itself. A Gmail account is free, so you need to have no worries about costs....
When you enable POP3 support in Gmail, you can even use Thunderbird or Evolution for it.
Note: nowadays every good e-mail service (so not only Gmail) scans automatically for Windows viruses, on the servers of the e-mail provider.
c. Another possibility is the use of this free web service, which is the property of Google: VirusTotal.com.
It uses a whole bunch of antivirus engines to scan every file that you feed to it, for viruses and other malicious software. That simultaneous use of multiple engines makes it the very best and most effective scan there is.