I wonder if she ever followed up on him (and possibly reprimanded him for his rather stupid plan).

I like to think so! *g*

I don't think G'Kar had enough of a point to justify inciting a riot. Yes, it's annoying that nothing visible is being done, but it's not always possible to solve things on command. He doesn't, at that point, have any real reason to assume that the senior staff *are* engaging in bad faith, and they actually are working flat-out to try and catch the bad guys. I think he's being unreasonable - and even if he were totally right, starting a riot still isn't much of a help with the overall problem!