Again, how do you actually know the author hasn't thought about it? I'm not praising the attitude your referring to, I'm criticizing your prejudices against the author, the baseless assumption that (s)he fits the label of "oblivious privileged SV tech nerd" you've decided to attribute.
If it takes you more than 30 seconds to come to "An app that allows anonymous public messages on a social network currently wracked by abuse is not a good idea", you haven't been thinking.
I think you're confusing "anonymous" with "uncensored". Nothing prevents these messages from being filtered for abuse.
Not to mention that being a single account, and hence easily blocked, the potential for abuse is minimal compared to the alternative of simply creating a new Twitter account, which would be just as anonymous.
My goal is for this to be used for: giving feedback, poking fun at companies and politicians, or maybe having a fun time with your friends. I hope it is not used for abuse and I do have ways of prevent abuse in place!
I would say I'm shocked anyone thought this was a good idea, but I'm not, sadly.
Privileged nerds seem perpetually oblivious of any problem that doesn't personally harm them.