Well, this isn't exactly a Great Moment In Cognition.
The NFLPA was at least holding its own in the public relations war with the owners over the lockout, so of course it decided it must put a torpedo in that. Which is why it got out that the de-certified union was urging draftees to attend an alternative NFLPA event instead of the NFL draft.
Couple of things about that:
1. Since the union de-certified, it's not technically a union anymore. So it technically doesn't exist. So, if I'm a kid who's been waiting all his life to walk out on that stage on draft night, I simply pretend you didn't hear anything but the wind. It stands to reason if you don't technically exist, nothing you say technically exists, either.
2. Seriously, guys? You're winning (or at least drawing) the PR thing, so you decide on a course of action that only makes you look a) spiteful and b) dumber than a paving brick? What possible benefit do the players think they can achieve by urging a boycott of the draft? (And that's what their leadership is doing, de facto, despite claims to the contrary).
Maybe these guys deserve to get worked by the owners in this thing.