The "green flame" or Star Heart as it is referred to, is very similar to regular green lantern ring as it creates: constructions, flight, invulnerability. However, it is unable to effect wood. Get it flame and wood? Anyhow, something that Rick pointed out perfectly was how Pat had been spinning his wheels the past decade. Plus, Pat hasn't really gone much into his original body guard history with Sylvester and their relationship. So, yeah why would the other kids really think he was doing anything. When he really decided to just hide everything away, even if was trying to "figure out" what the Injustice Society had been up to.
Plus, even though it has been just for plot points, you think after Courtney decided to wear the stars full time, he be going over the various members of the IJS. Plus, also maybe doing more background research like he did with the Wizard after he was killed and Pat discovered he was. Everything from who he associated with or a big WHY he might have been killed. Because if the Wizard had a kid, Hourman had a kid, maybe the other JSA and IJS members did the same.