The thing that makes Streak different from most superheroes is that he isn't really in the crime-fighting business. He's more the saving type. Say there's a fire and people are trapped inside the building. He's there to get them out. The clichéd cat stuck in a tree? Streak shows up. When there's a car about to go off a bridge, Streak comes hovering in and guides the car to safety. That was his first big save, if we're in the business of ranking superhero activity. It was on the news and everything. About a year ago, Mr. Mayhem set bombs on the Liberty Bridge and of course they went off during rush hour. Streak contained the explosions and he saved two of the cars that were skidding off the bridge. Some of the Super Seven showed up to help. I think it was Sure Fire who captured Mr. Mayhem a few hours later.
Don't get me wrong, if there's major crime in the city and the Super Seven are tackling it, Streak will jump in to help. But he's not good at that on his own and in all honesty, it wouldn't be very exciting. That's how it is because his superpower is telekinesis. He can move things around with his mind all he wants, but I don't think he can fight well. I've seen him throw a decent punch on news footage, but that's it. I guess he could use his telekinesis to pick up guys and toss them around, but that's kind of lame isn't it?
In some ways, I think it's better if Streak sticks to saving people. Vigilantes get a bad reputation for "taking the law into their own hands" and not being accountable to anyone. At least no one will think Streak is irresponsible. He can keep a lower profile too, since he's not out on patrol every night or busting any crime rings on his own.