I would like to remind all participants and readers that if a proposal is made, all that is needed (the bare minimum if you have an opinion at all) is to state your support or otherwise, once. The number of contributors to the thread is what's important, not the number of posts each contributor makes.
If you would like to support or oppose part or all of a proposal some justification is a worthwhile addition, and discussion of what you believe to be erroneous logic can be very helpful to discover flaws and offer improvements that would make it acceptable to you (if you oppose the original version).
If you want to support the proposal as much as possible, supplying case studies (simple or detailed) will help considerably to clarify the urgency and importance of implementing the proposal. If you want it to have the best chance of success, avoid berating the opposition at all costs, and instead present arguments that explicitly refute the central point. For example:
Argument: Reward Open because I need to reinforce my ship to survive PvP, so I can't carry as much cargo.
Refute: Open is not dangerous, other players are dangerous. Reward PvP encounters, not just the mode. This kind of response is ideal.
Simple Contradiction: I disagree. This is the minimum useful contribution, box ticking.
Ad Hominem Attack: The poster doesn't know what they are talking about. This tells the reader more about the attacker than the target.
Base Insult: The poster is an idiot. This is of no use at all and should ideally be removed by a moderator.