The one thing Starfleet obviously can influence is whether its own proprietary designs leak out to the civilian world. If the civilians buy from Klingons, then that's it - but it's not reason enough to give up on limiting access to Starfleet material.
In that respect it's noteworthy that civilians are not denied the use of personal weapons on par with Starfleet ones, including weapon types used by Starfleet itself. It sounds like a general policy regarding personal weapons more than anything else, even if it was dictated by practical concerns rather than by the UFP President being named Heston. TR-116 is a major exception to that, yet not a policy reversal as far as we can tell. Although we really can't, because civilians from that point on are considered criminals and terrorists anyway, and their bearing arms has little effect on that either way.
Timo Saloniemi
In that respect it's noteworthy that civilians are not denied the use of personal weapons on par with Starfleet ones, including weapon types used by Starfleet itself. It sounds like a general policy regarding personal weapons more than anything else, even if it was dictated by practical concerns rather than by the UFP President being named Heston. TR-116 is a major exception to that, yet not a policy reversal as far as we can tell. Although we really can't, because civilians from that point on are considered criminals and terrorists anyway, and their bearing arms has little effect on that either way.
Timo Saloniemi