I haven't read through this entire thread, so it may have already been stated... but...
This is NOT A MERGE LANE. The people traveling eastbound on Glenmore to get onto northbound Deerfoot have the right of way. The other guys traveling from southbound Deerfoot onto eastbound Glenmore have a yield sign!
I go this route every day on the way home from the office. At least three times a week, I have to slam my brakes on because some nimrod in front of me has slowed down (and sometimes even stopped!) to let someone coming off Deerfoot go in front of them.
Yes, it's the nice thing to do. It's polite, it's friendly... you're a nice guy, I get it.
But you're going to KILL somebody!
Right of way is meant to induce traffic flow. This means that the twenty cars driving behind you on eastbound Glenmore are not expecting you to stop. They are expecting you to forsake your niceness in the name of respecting the rules of the road and continuing the flow of traffic. They are not expecting to have to slam on their brakes because you've decided to let somebody with a YIELD sign go in front of you.
This also goes for the jerks that ignore the yield sign and decide to force-merge with everyone else.
Merge lanes only work when it's an actual merge lane and everyone is expecting a merge to take place... they do not work when you're merging from a red light, a stop sign or a yield sign.
That isn't called merging, it's called breaking the law and endangering everyone around you!
/rant