I have it, in the 12th house. A lot of hidden anger, bitterness towards people who have done me wrong. But, I keep my anger in chains, and I don't release it so easily, because if I do, I will burn everything and everyone. Or I amputate, that's more common.

Scorpio Mars in the 4th here. When I was much younger that placement had more control over me then. Once I recognized how it affected my reactions I decided to have more self control. It take a LOT to get the volcano to explode now but when it does you better run and I mean run. I would never physically hurt anyone or anything but I do have a mean and cutting vocabulary. I've put it in a closet but haven't locked the door. Some people earn what they get. I save the volcano for them. 

This is interesting convo.

I possess this placement.

I'm very aware of what makes person A tick, know their soft spots after a bit. This is kept to myself in the event that it MUST be used in some combative form or another.

I find the placement good for tactic-focused people. Bruce Lee has this placement. Fighting is more than just skill. Ghandi, Kurt Cobain, Rogan, Stern, Zappa, Corgan, etc. There's a depth added to that which one is driven to do or passionate about.

I don't like deploying such tactics on people. It's dangerous, fucking around with the psychological pet-peeves and hard dislikes of others, but this is done in unavoidable events, from my experience. (Can make for fun too.)

It can also be indirect. True enemies are created when a person decides to blindside another.

I'm unsure if one should like this placement in contact with Mercury.....

I have 3 friends with this placement and we have fight many times, I have Cancer mars and I can always predict their movement, manipulation or any type of attack, I never let any of them beat me

Scorpio mars back off when he meets someone smarter emotionally than they,

Hoping for insight as I write.  I have Mars Scorpio in the 5th house at 14 30.  Neptune isn't far away at 22 30.  Venus Scorpio in the 4th.

When I first read this, I denied that I am someone who uses that stinger against others.  And Yet.  I have had some fights.  I do have a deep awareness of connection that when threatened manifests as jealousy and possession.   

*Insight - 4th house Venus desires security deeply.  My Mars defends.   My motivation is for intensity and depth and transformation.  Even if I want to be nicey nice and diplomatic - Sun in Libra in the 4th, Sun debilitated - not a confidence builder, combine that with Cancer rising!  (moon in Virgo kinda saves the day with some reasoning energy in the 3rd house of communication)  Feelings are my currency, or have been.... with progression - now Virgo Rising, Sun Sagittarius ...  Neptune remains in Scorpio, now 3rd house.    My 'bent' has become more earthy and dry.  Mars is exalted now in Capricorn too.   This Mars in Scorpio has served me well.

At base, I am a low energy person.  Somehow I've been able to tap into Scorpio to get me going when I've had to pull myself out of depression for instance.  

I suppose at times - as with most things - a double edged sword.  Realizing - I AM a defensive person - I see threat easily.  Learning to modulate and emotionally regulate.  Times of stress though, it rises up and feels so integral to self preservation.

I have one. I’ve never been the aggressor, but have had to defend myself, my safety, my money, my family and my space against violations. Many violations. I’m completely tolerant insofar as you are not infringing upon my natural rights, but if you violate those, I have no qualms or guilt about doing whatever I have to do to maintain the sacred nature of my life.