Has anyone tried moving the little tab on their front fender forward, so that the fender rotates back and provides more coverage?

The reason I ask is that I do sometimes need to use the bike rack on the bus (I know: soft). The bus drivers are really thingy about the racks and refuse to let any bike on if it has a fender which goes forward of the front brake at all. I was planning on cutting the fender off at the place where it passes through the fork, but then I had this hair-brained idea.

I guess I would need to drill out the rivets which hold the bracket on, and then rivet the bracket on near the front of the fender so that the whole thing sits back further around the tyre.

Has anyone tried this, or is there some good reason why I should avoid it? I'm talking about SKS P45 fenders here.