This is a fix for Global Power. I submitted it to David Pulver a while 
ago, on FIDOnet, and he agreed that it solved all those problems with 
ridiculous global range (i.e., being able to Mental Blow everyone in a 
2-mile radius!)

Telepathy Power (5 points/level)
  Global range is not 1% of actual range. Global range is one yard
for Power 10, two yards for Power 11, and (Power-10) yards, squared,
for Power 12+.

Also:

  SUGGESTED "FIX" FOR KEEPING TELEPATHY RANGE DOWN (if you don't want 
galaxy-spanning telepaths):
  Once range reaches 250 miles (at Power 22), each additional level
of Power adds 250 miles.