Computermix, while I really do appreciate your heel-face-turn and coming clean (as does the rest of the forums), you made the biggest mistake in your Blockland career by releasing these, and it'll take a fair amount of work to fix it up.
Even private releases are problematic. We'd appreciate having the names and IDs of everyone who can crash a server instantly (so if our servers "mysteriously crash" after banning or angering one of them we know who is likely at fault), and I'm sure Badspot would love it if you PMed him the details of the vulnerability so he could fix it.
Also, what if these "responsible" people aren't so responsible? What if they gave it out to someone who pestered them... or even blackmailed them, as Dotdot might do?
Now, if they're well known for being responsible I wouldn't worry. I'd trust Ipquarx with just about anything short of my life, and TheBlackParrot seems pretty damn reliable as well.
As for the hack itself, has anyone actually been revoked for using it?
Also, a speedkart server with the anti-floathack script has literally nothing to fear from Blhack.dll except the crashy thingy. Those will soon be safe I predict.
But seriously I hope Badspot patches this stuff.