A complication with patent trolls is that they're immune to defensive patents: they don't practice, so they can't be countersued or bargained with. I think you

A complication with patent trolls is that they're immune to defensive patents: they don't practice, so they can't be countersued or bargained with. I think you probably mean "other companies that develop mobile apps." In this case, especially in the context of the direct copy of the TapTapTap app as shown above, it looks like this means "our own developers."