Well I pirate in lowsec in a T2 fit T1 frig, solo, and without alts, implants or boosters. Get a fair few good fights too. YMMV or course.
My point about the T1 cheap fit frigates was not that they were any good, more that you need to learn to lose ships regularly. It was an emotional thing for me to get over. I don't intend to make any money pirating, just have some fun, and that means diving into fights I might not win. Yeah I lose a lot of ships, but I also get some great fights. The biggest thing holding me back from having fun when I first went into low sec was the fear of losing ships. I was telling myself to be brave, but could spend 2 hours roaming, trying to find a fight against a pilot who was: solo, in a T1 frig, had no mates in local, etc. and log off with nothing. In RvB I could join a fleet in a T1 fit frig, dive into a fight, shoot some stuff, get blapped and reship, and do this five times in about 15 mins! All the while having a blast.
Since moving back to low sec Ive taken an Atron up against faction cruisers just to see what happens. What happens if it is Vexor Navy Issue is that you get blown up. Equally Ive taken T1 frigs up against Destoyers, and killed them. I've dived solo into plexes occupied by two frigs, and got blapped. Equally often they just cut and run, and occasionally, just occasionally, you take both out. Which is a great feeling.
But I would never have done that before.