I was just playing on this server, "Half-Bit's House of Fatalities" on ctf_2fort_classic. So I'm a soldier, and I know how to surf over water so my little rollout thing is to rocket jump out, skim over the water, rocket jump out of the water, and jump onto the enemy battlements. I was doing this with a rocket launcher to spite this one guy (douchebag name: [+|TerZ]<<HLSebλx>>™) with white bill's and a machina who would taunt after every kill. Classic scum.
I was jumping up and trying to kill only him, and after some kills he complained in chat. He was tired of me spawncamping him. So I felt bad, and switched to rocket jumper, doing the same rollout and jumping up in his face only to hit k or j on my keyboard, bound to "kill" and "explode" respectively. An engineer had a sentry next to him, so I usually could pull it off right before I got within the sentry's range. I got banned for spawncamping.
I guess that was from before the RL -> RJ switch, and I thought that was unfair because one sniper could go on the battlements, literally right next to his spawn and have a clear sight of everyone who would attempt to cap the intel. The bridge didn't have any cover and was pretty long. After I came up with this revelation I realized that the map was built like stuff and wasn't any more annoyed that I was banned.
Also, when I jumped up with the rocket launcher, I wouldn't go full tryhard and hunt him as he backpedaled into the spawn, it was just me jumping up, seeing if he noticed me, staying like this for some time and if he didn't, I would shoot 2 rockets to kill, jump off and head back to spawn or kill myself. If he had noticed, he would try to jarate+buswhacka while I attempted to jump away or kill him as I fled.