Before anyone says anything about me not doing a search on this post, the last time this was posted on was in May of 2012.
As far as I know, punting with a gravity gun is as minge as it gets. Me and Plasmo were in a 2-player server messing about with my Gravgun needs, and realized a wooden box flung at the head is an easy 2 hit kill. Honestly, turning punting off entirely nulls out a section of junk items. It comes down to figuring out what can and cant be punted. In FPP (Falco's prop protection) There was a specific menu where what items can be punted, and what can't. I don't know what the current situation is with prop protection, but Edlar or Lost could probably poke at the code of it.
The pros of this:
♦ Allowing the good ol' fashion punting of stuff.
♦ Makes another capability of a science-created weapon. One that would make them a bit less of an indirect class of damage (aside from the ar2, which is a drop-reliant weapon. Sure, they can make the ammo, but whats a bullet without a gun?)
♦ Junk items no longer are worthless as bullet fodder / a dissapointment
♦ No longer just a weapon on the hotbar to quickly pickup and f2 items.
♦ Make an alternative to combat situations for those who prefer not to use guns.
♦ Another thing to add as a good crafting, would have to be steep though. (120-450-100, Parts: Servos, boards, sensorpods ahoy!)
♦ Another thing for rich vets to screw around for (Basketball, football, other recreational things that people can do idly. )
Cons:
♦ prone to abuse (Do I really have to go into this, anything can be abused. Seriously.)
♦ Possible prop killing by minges. This can be fixed honestly.
♦ Cant think of much, really. Punting stuff is kinda fun as a pinnacle of science. If you can make a fusion reactor, I'm damn sure we can use a gravity gun.
In short, it'll have to be closely watched but would add quite a layer of capable stuff to do, especially when it comes down to downtime during storms, inside. Which happen way to flippin often. I hate radiation storms :C