Quote-Morally bad Pleasure ? => When it would destroy friendship or the justice to others it would destroy our values, securities, good feelings/pleasures with others, chances of reciprocy advantages, bring great disturbances and destroys our kastastematic Pleasure, so an Epicurean would avoid it. Nature gave us for that feelings like compassion, empathy and good feelings(Pleasure) by helping others.
I've been trying to take a more careful approach to the language that we use when we talk about pleasure and pain, and a crucial distinction needs to be made here between 'pleasure', which is a feeling, and 'actions or choices that produce pleasure'. The feeling of pleasure is always intrinsically good; behaviors and decisions that produce pleasure may or may not be instrumentally good.
When we say that some pleasures should be chosen and some avoided, what we are really saying is that the actions we take to pursue the intrinsic good of pleasure are sometimes more likely to produce the intrinsic bad of pain. And the reverse is true is well; choosing to endure for a time the intrinsic bad of pain can often lead to greater pleasure.
These points are no less true for the masochist; if he tells me that enduring pain can be psychologically pleasureable, and that the psychological pleasure is greater than the physical pain, then he, too, is practicing choice and avoidance.
But I agree with most of what you say! I wouldn't want to lose the capacity to feel pain entirely while I still lived.