I believe there should always be a hardware override to protect against crafty code such as viruses.
To leave hardware at the mercy of software is dangerous, I mean if the BIOS can be flashed by a simple program (as is the case with CDRW drives and the PPCs) then they could potentially be destroyed by a malicious program.
The internet is another thing, I believe backdoor programs could be a severe threat even to Amiga users especially with broadband.
Wonder if anyone uses their Amiga as a hardware firewall in some way...›
I found Hitchhiker 4.11 and reported it to Virus Help Denmark, I found this with Virus-Z before moving onto Virus Executor.
Years ago I found a bootblock virus on a Heimdall 2 copy a friend lent me. Didn't say the name of it though.