Low Levels in Old heroics

First post, not sure if intended or not but don't feel like its intended so posting it. Right now you can take low lvls that aren't supposed to be in heroic dungeons into heroic ones. Example: running a lvl 58 through Heroic Ramparts instead of Regular Ramparts.

They must be able to enter the regular dungeon of course.

Exploit because you used to have to be lvl 70 to be able to enter.

Must gotta have a higher lvl character(such as a 90) in group to zone in first and to set it to heroic.

This is a nice little extra exp boost if someone has a exp flask or monk exp buff just to lvl faster.

Proof of lowbie in heroic dungeon: