I know I have raised this issue before.
I know I don't need to sip from pools.
I know teleportitis can be lost by sipping from a pool again.
I know I can perform time-consuming things in no-teleportation areas.

That said, please refrain from addressing the above things in your responses and if that's all you have to say about it, then just don't say it, I heard it all and it doesn't convince me in the least that the current situation is fine.

Now:
Practically every player sips from pools. Potential benefits are desirable and the most severe consequences, namely cursing and/or dooming can be removed via altar and high piety.
Other serious consequences like sickness, corruption, poisoning, elementals can all be mitigated/prepared for.
Personally, I feel the most severe potential drawback of pool-sipping is obtaining the dreadful teleportitis, on ANY CHAR.
I simply hate this intrinsic. I'm not posting this to discuss the intrinsic itself as I realize many players like it and some consider it the best thing to get from a pool, save for a wish.
Well I don't. I hate it a thousandfold. With teleport control or without, I don't care.

What I'm asking for is some means of removing telelportitis once obtained from pool.
I don't care about the cost, I can get doomed+cursed+poisoned+stunned+confused+bleeding+sick, get several points removed from all my stats and have 1d10 hostile greater balors summoned as a consequence of losing it, I will take that mighty opportunity GLADLY. Any time.
I will also gladly sacrifice a wish or 3 wishes IF that is what it takes to remove the damn thing. All I'm asking is a way to lose the intrinsic teleportitis somehow.
I realize that intrinsics are semi-permanent and cannot be simply lost other than via pool-sipping. I think however that teleportitis significantly affects characters that often perform time consuming tasks and makes them almost impossible to perform by the constant prompts.
Also I had a situation where I was starving and had no prayers left. Suddenly a pixie appears... needless to say it dropped a corpse. In a life threatening situation, I had to eat it.
I had teleport control but once all pools in the entire game were drained and teleportitis was still there, I shift+Qed the character out of pure rage.
That shouldn't take place, game elements as annoying as this should be removable somehow via roleplaying.

I like to build up my char slowly and over a long period of time, but I know this isn't the case with other players (mostly) and thus, fewer people complain about teleportitis.
My characters usually have several different methods of teleportation in every game, irrespective of class; I don't need intrinsic source which hits exactly when I don't need it and doesn't activate in life-threatening situations.
Every other negative intrinsic obtained from a pool can be mitigated: there are means of removing corruption, dooming, cursing, poison, sickness and anybody can kill snakes or elementals.
Even permanent invisiblity, though mostly desired, if obtained early can make arena quest impossible to complete, BUT there are potions of visibility. They are rare but they exist. They can be wished for or found randomly.

Maybe create potions of steadiness or anchoring or whatever the name could be. That's fine if they can block (on demand) teleporting ability ENTIRELY, but also include teleportitis, I will gladly make an archmage and wish for 10000 of those for personal use. But make it POSSIBLE.
Mentioned potions could add flavor by giving the option to throw at teleporting monsters to "steady" them - prevent them from teleporting for a set number of turns, depending on b/u/c etc.
I would prefer something permanent but this will do too.

Alternatively, just make it wishable. A wish for "steadiness" could result in a message "you suddenly feel steady".
It doesn't involve much coding at all. Just a neat little thing so useful for desperate players that hate the intrinsic and are willing to do anything to get rid of it.

Now to summarize:
- I don't care what the costs/consequences are of (semi) permanent teleportitis removal, just make it possible
- I don't care how it's implemented, be it an extremely rare item, complex and costly process or a potion like described above
- It doesn't disrupt the game difficulty; the balance is kept, only the annoying part is removed
- It doesn't ruin any lore elements


EDIT: Here's a (somewhat) related RFE: http://www.adom.de/forums/project.php?issueid=2008