Ignore invalid argument for multiple terms

Situation:

I set up a view with node->nid as an argument, allowing multiple terms per argument with +. I link to the view, for example, with compare/cms/1+2+3+4. This works fine. It shows a table of the nodes by argumented nids.

Problem:

I delete node #1. Now the argument invalidates and (standard) redirects to 404 page. I know I can set validation to "all values", preventing the 404. But here comes the feature request: why not drop the invalid single argument 11, and show the page as if with 2+3+4?

Currently it's "all or nothing" when validating an argument. My feature request is to have a validation option "ignore invalid {nid}", and show the table with nodes 2+3+4 anyway. Is this possible? Maybe not by design, right?

Reason why I need this:

Google direct my users to 1+2+3+4 pages. If 1 is deleted, they either get a 404 error or the wrong table. This is undesireable. They should find 2+3+4, what they were looking foor.