What really needs to be emphasized is the needs of the many above a few.

Again, no role gets to 'dictate' the pace of the run. Individuals that get particularly abusive, end up being pursued beyond simple kicks. GM reports and attempts to contact their FC leadership to inform them of the incident are not beyond the scope of actions can be taken against people who are especially bad, but these are the most outlining cases - not situations in which people simply disagree as to the purpose of a role, as we have here.

In the end, this thread serves as an example why Duty Finder and pick-up groups are viewed with caution, if not with outright negativity.

OP - You were as much in the wrong in this particular case as the pair you complain about. Silent rejection is not an appropriate response, and treating rudeness with rudeness in kind is just pouring fuel on the fire.

Joining a party means accepting a duty to communicate and work together. This succeeds all assumptions as to the purpose of your role.