they still have a powerful bite and a large number of teeth. This added with their stregnth and speed does make it a potential issue. As long as you exercise caution you are fine unless you are bit in an unfortunate spot.
SD / Dwarfs can still have massive heads. My Dwarf Purple who is 2 years old this March has a head that is as large as my hand and she's about 12-13' currently feeding on 4 pound rabbits. This is still large enough to cause a serious issue - again more so if you "jerk" back as a reaction.
Dwarf Burmese - true dwarf - do not get that large. I have seen some females on eggs at 6' in length. It really looked like a funky ball python with a little extra size! But still, smart to excersise care and respect. Heck, I've taken a bite from a 3' retic that got infected and had pretty good tears in the skin from such a small snake because it bit and pulled himself back.