Can you take off shoe labels?

It's well known that Mabel's Labels shoe labels are:

• extra tough
• extra sticky
  
• do not rub off on socks
  
• fit nicely into the insole of shoes, boots, skates and rollerblades and are
  
• shipped with protective overlays to ensure durability.

But what happens if you want to take the labels OFF the shoes?

From Lady M's post "More on Mabel's Labels":

"My son outgrew his his nicely labeled shoes this week, and I wanted to return them to anonymity before giving them away to Goodwill. With only a little bit of tugging effort, I was able to remove the Mabel's Labels from each shoe, with barely a trace of stickiness left in the shoe.

The labels stayed on when they were supposed to stay on. And they came off when they were supposed to come off. I'm a fan."