Nobody is forcing you to stay in the congested lane. It was your choice and you have no reason to think everyone else has to do the same. If it's a legal lane, then drive in it.
Here's when it's not OK: cars in the exit lane are traveling at 2mph. You drive up next to the line, slow down from 55mph to 2mph and wait with your blinker on for someone to let you in. Now you've slowed a second 55mph lane down to 2mph, blocking thru traffic and creating a dangerous stoppage in the non-exit lane.
Seriously, don't do this.
You're right, it's a major dick move. It's reckless and endangering; police should treat it accordingly.
I catch public transport to work. Mostly because I'd rather have a nap on the way to and from work than deal with wankers like you.