Some times decent people do dumb things.
Decent is an over-exaggeration, he tries to strut around the forums every so often and act as a dandy fop trying to impress people with pretentious stunts like this, but in reality he will do anything he can to climb over everyone in order to garner respect and then tries to defend his actions with virtually nothing except that he thought he could do anything he wanted.
Looking back in the past there have been claims, backed by testimonies of witnesses (some being ex-members of his posse) and parallels found within the work he presents as his own and the work of others, that he has:
stolen builds
stolen scripts
annoyingly sent his minions out to advertise his stufffest server (with one testimony stating that he even blackmail his followers, his friends, into contributing to his propaganda scheme)
And all this was done multiple times after multiple times.
I don't think our problem with Rykuta is with his lame script-stealing stunt alone, it's with the fact that he never stops with these lame-ass stunts.