Penalty for Gate-taunting

I already said this a million times:

The killer should be able to close the exit doors (using the same handle as the survivors) in one go (like closing the hatch) IF a survivor is present in the exitgate area, forcing them out and having hte door now once again closed.

This poses a risk for those that stay there and heal in the safety of the exit door, and poses a risk for those who are not there while others are, it would make for much more interesting and tactical gameplay.

No. The killer lost. If they don't like that happening they can get good.

Not sure what you mean by the first scenario, yes if 2 are slugged and crawl for the door and 1 player is in the exit door area, you would be able to walk up and close the door forcing the one in the area out and keeping the two who were crawling stuck infront of a closed door.

That is exactly why that is so interesting, that 1 player should have ran back into the level (taking a risk) to help the other two escape OR they should leave immidiatly preventing the killer from being able to lock the door.

on the second scenario, if a Nea is opening the door infront of you, and she runs into the exit area and does not leave, then yes, you can close the door and gain an advantage (unless the others are opening the other door in the meantime), the Nea can also choose to instandly run out, therebye taking away your ability to lock the door BUT now she is atleast out of the match so you can use that, the Nea can also choose to take a hit but run back into the match killing off the boring safety of the exit gate area.

I honestly think this would make the game a lot more tactical and interesting for everyone involved.

Taunting at the gate is lame and immature but there are two three things to keep in mind about it:

1. As lame and irritating / insulting as it is, at the end of the day these are random strangers you don't know, who don't know you. You're all just anonymous silhouettes behind computer monitors and will almost absolutely be guaranteed to never come anywhere close to meeting them in real life (chances of ever encountering them again in the game is pretty low too). It isn't personal, so try not to take it that way. It's just DBD's equivalent of spiking the football.
2. It's basically just a meme at this point. Everyone knows that this what most survivors do, so they just do it. It's just a thing. It's so common as to be meaningless.
3. I've personally found that if I don't give in and rush them or anything, if I just stand at the entrance to the gates and nod, it will often surprise the teabaggers and make them stop doing it. They will often, in fact, nod back. They seem to see that, as the killer, I'm saying "hey guys, good game, I had fun", and that tends to wipe away the immaturity more times than not. It's as if they realize "oh, the killer's not mad, he's actually being cool", and respond in kind.

I used to be really aggravated when people teabagged and celebrated at the exit gates but now I don't let it bother me at all. They're just goofballs laughing about the fact that they won, but by shrugging it off and saying "hey, it's fine, it happens" and giving them a few nods, maybe even spinning in a circle, doing a little dance, they'll change their tune and actually change their taunts to friendly gestures. Hell, sometimes they even come out of the exit gates and chase with me, get in my face and ask for a free hit (which helps them AND you to scrape up some extra points) and - most importantly of all - it greatly reduces the agitation that comes with their stupid behavior.

TL;DR: As annoying as exit gate shenanigans are, if you visually demonstrate to them that you're the bigger man (or woman) and simply nod and show them that you accept their victory, they will often change their tone from a disrespectful one to one that's more friendly. And even if not, these people are just internet randoms. Don't let them get to you.

When I "befriend" the survivors, as described above, at least one or two will often come out of the gate, point at me, duck (not teabag, but actually "bow"), and just to make sure that I'm not betraying their trust I'll back up first before I swing, like "is this what you're asking me to do"? They will then nod and / or walk up to me again or wave me to them. I give them a smack, that's when they tend to rush toward the exit (just preservation instinct I suppose) but will still often stop to nod at me beforehand.

Seriously you guys, you should try this. When you get to the exit gate - where you KNOW there will be survivors waiting to taunt you - just be nice to them. As counterintuitive as that may seem, you can often turn negative feelings into positive ones, end the game on mutually respectful terms, and maybe even get some free bloodpoints out of it too.