Ask yourself "what is the benefit?" How is this more fun for humans? Artificial difficulty (in this case, spread) is not a good gameplay mechanic. Implementing spread purely on the basis of "realism" in a game like Tremulous is absurd because Tremulous does not aspire to be realistic. If you could give examples of how this would be more fun, and not frustrating (MDs are hard to use. Making people miss shots for no reason is frustrating.) then your idea would likely be considered (at least, by the community).
MD would not spread much, it would be nearly meaningless(very very small spread, would be to remove the perfect aim), you hardly missing a shot because of the spread, perhaps in very large maps(not in oficial maps like acts).
about gameplay, spread help in balance, prevent some camping, or, help to kill small aliens in close range(yes, in close range some spread help), prifle + rifle spread = perfect for close range.
some weapons of 1.2 has no much negative points, some details like reload or spread can help to balance these weapons, taking into account that aliens are weaker in 1.2(compared to 1.1. aliens).
like rapid reload for lgun(like 1,5 or 2 seconds) every 25 shots, lgun would have a bit of spread and damage(maybe, +1), the gun would be more realistic at the same time that would give aliens time to attack. (of course, lgun could be a bit cheaper, like 200 credits). and fast reload for blaster(every 8 shots, 1 second)
and about laser cant have spread..., see the weapons anims, the guns have some recoil, while his aim remains perfect, realism?
TC forums have been dead for a while and CQB is dying.
but, some players still playing tce(even the game being very buggy, still very fun), the problem of cqb is the 1 map to play(beta), but ok, in next version he had been open for mods and maps, tremulous survived until today because of the players, maps and mods : )