Player Set Level Cap

This idea came to me as I was reading up on Karazhan. The thing is, Karazhan is what some people refer to as a 'gear check' to see if players are ready, gear-wise, for higher level raids.

Now Karazhan sounds really, really cool and fun but now that WotLK has came out and the level cap has been kicked up to 80, by the time a level 70 player had got to a sufficient gear level, they would have probably ding'd to 71 maybe even 72.

This may not sound too bad too some people but it would ruin Karazhan for me, no longer being as difficult, as challenging. So that's why I want, no demand, an option to manually level cap myself so that I can still enjoy all this great content but not level up, as though I didn't have the expansion. Then, when I felt it was time to venture to Northrend, I could go to an NPC (or something) and maybe even pay a small fee, to remove my level cap.

I know most people will think this is a stupid idea but I'm one of the many people who started playing when WotLK was already out, so otherwise I'm never gonna get to experience this content as it was intended to be experienced.

That makes me sad :(