Well, with Weavile, using Reversal off the bat would be the smart option, I mean, it isn't going to SR, and if it SD, you've still just hit it with a 20 BP 4x effective move, so it's still going to hurt it's low Defense. In Abomasnow's case, you obviously wouldn't be able to beat it straight off, you'd have to come in later with your health already down and fire one off, because the fact that it's slower and has Hail going on, you wouldn't stand a chance. In that case, this would just function the same way Aero would in the same situation, get up Rocks then die, so nothing really lost. Mamo would be tricky, but if it's a lead it's more than likely going for SR first, so you'd be fine to set up yours, then go for the Reversal expecting Ice Shard. After that you could Sucker Punch to finish, which would beat even with it using Ice Shard.
So, personally, I think it could be considered a pretty good suicide lead with a couple of pretty good benefits.