void(0) is disabling my onclick event (ie only) ???

[VK]

The use of the javascript: pseudo-protocol for its side-effect
should be avoided when there is a better alternative.
In the case of bookmarklets, there is no better alternative.
That's the distinction.

So shall be it!

At least newcomers may use a bulletproof protection against the initial
beatdown: just say "my bookmarklet doesn't work as expected" - do not
say "my link".