Season legs liberally with olive oil, salt and pepper. Add as much Tabasco as you can handle, cover and refrigerate for 1 – 2 hours. Combine barbecue sauce, garlic and lemon in a small saucepan and heat to blend flavors. Slap the frog legs on a well-oiled white-hot barbecue and cook until just done, about 4 – 5 minutes. While cooking, baste with barbecue sauce.