Is having a BBL procedure highly not recommended for someone prone to forming keloids? (Photos)

Thank you for the question and photos. I know keloids can be a major problem, and I feel for you. Given your history, I would say that any incision on your body can result in a keloid. Some areas are typically more prone to keloid than others (ie chest, ear, etc) but this is not always reliable. The one good point is that each incision for a BBL is very small (about a centimeter). 

It is very likely that you will develop this type of scars on each of incisions used for liposuction and fat transfer (typically 8-10, 1 cm long incisions). To a certain degree, these scars may be manipulated with early injection of corticosteroids and pressure tape, but it is impossible to predict what would your result be. It is worth of discussing pros and contras with an experienced board certified plastic surgeon with expertise in BBL surgery.  Good luck.

Your risk is greater for having keloids as you have evidenced a proclivity in the past; but it does not necessarily mean that you will have keloids from the small incisions.  For keloid formers, there is not a way to prevent keloids.  In general, the longer the scar or the greater the number of scars, the greater the chance for keloids. The keloids may require multiple modalities to achieve the best results.  Laser may help to some extent with some types of scarring issues. 
As an author of "Scars and Scar Revision" in Reoperative Plastic and Reconstructive Surgery, I am well versed in the potential treatment options.  One treatment may be helpful for one patient while another treatment may help another patient.  Keloids can be reexcised, injected with steroids, and irradiated.