Bravo! This should be the logical move, since 1. the Budapest Memorandum has proved worthless, 2. the Russians only seem to understand brute force, and 3. never in history has the west saved Ukraine from Russia, despite promises to do so. (Not that they should.)
I think this move would make the west reconsider its passivity. Either they help, or let Ukraine defend itself. I think that’s for western countries to decide, but the Ukrainian point of view goes like this: we’ve been abandoned to the wolves twice in the past century (after each of the world wars) we need to either get these pussies in the west to start helping us, or we need to get ourselves some weapons to counter the superior military might of Russia.